diff --git a/bot/app/factories/build_services.py b/bot/app/factories/build_services.py
index 620313a..f88a04f 100644
--- a/bot/app/factories/build_services.py
+++ b/bot/app/factories/build_services.py
@@ -81,6 +81,8 @@ def build_core_services(
 
     # Wire services that depend on each other
     try:
+        # Allow subscription service to consume promo codes
+        setattr(subscription_service, "promo_code_service", promo_code_service)
         # Attach YooKassa to subscription service for auto-renew charges
         setattr(subscription_service, "yookassa_service", yookassa_service)
         # Allow panel webhook to trigger renewals through subscription service
diff --git a/bot/handlers/user/promo_user.py b/bot/handlers/user/promo_user.py
index 2da7d16..cefcd2c 100644
--- a/bot/handlers/user/promo_user.py
+++ b/bot/handlers/user/promo_user.py
@@ -190,9 +190,19 @@ async def process_promo_code_input(message: types.Message, state: FSMContext,
                 # Both failed
                 await session.rollback()
                 logging.info(
-                    f"Promo code '{code_input}' application failed for user {user.id}. Reason: {result}"
+                    f"Promo code '{code_input}' application failed for user {user.id}. "
+                    f"Bonus reason: {result}. Discount reason: {result_discount}"
                 )
-                response_to_user_text = result  # Original error message from bonus code attempt
+                bonus_not_found_text = _(
+                    "promo_code_not_found", code=code_input.upper()
+                )
+                discount_not_found_text = _(
+                    "promo_code_not_found_or_not_discount", code=code_input.upper()
+                )
+                if result != bonus_not_found_text and result_discount == discount_not_found_text:
+                    response_to_user_text = result
+                else:
+                    response_to_user_text = result_discount  # Prefer the discount attempt error
                 reply_markup = get_back_to_main_menu_markup(
                     current_lang, i18n
                 )
diff --git a/bot/handlers/user/start.py b/bot/handlers/user/start.py
index cd2d980..5df4bce 100644
--- a/bot/handlers/user/start.py
+++ b/bot/handlers/user/start.py
@@ -675,7 +675,7 @@ async def main_action_callback_handler(
 
     if action == "subscribe":
         await user_subscription_handlers.display_subscription_options(
-            callback, i18n_data, settings, session)
+            callback, i18n_data, settings, session, promo_code_service=promo_code_service)
     elif action == "my_subscription":
         await user_subscription_handlers.my_subscription_command_handler(
             callback, i18n_data, settings, panel_service, subscription_service,
diff --git a/bot/handlers/user/subscription/core.py b/bot/handlers/user/subscription/core.py
index 60555ee..2f7e4db 100644
--- a/bot/handlers/user/subscription/core.py
+++ b/bot/handlers/user/subscription/core.py
@@ -1,5 +1,6 @@
 import hashlib
 import logging
+import math
 from aiogram import Router, F, types, Bot
 from aiogram.filters import Command
 from aiogram.types import InlineKeyboardButton, InlineKeyboardMarkup, WebAppInfo
@@ -39,7 +40,13 @@ def _hwid_callback_token(hwid: Optional[str]) -> str:
     return hashlib.sha256(hwid_str.encode()).hexdigest()[:32]
 
 
-async def display_subscription_options(event: Union[types.Message, types.CallbackQuery], i18n_data: dict, settings: Settings, session: AsyncSession):
+async def display_subscription_options(
+    event: Union[types.Message, types.CallbackQuery],
+    i18n_data: dict,
+    settings: Settings,
+    session: AsyncSession,
+    promo_code_service=None,
+):
     current_lang = i18n_data.get("current_language", settings.DEFAULT_LANGUAGE)
     i18n: Optional[JsonI18n] = i18n_data.get("i18n_instance")
 
@@ -61,21 +68,46 @@ async def display_subscription_options(event: Union[types.Message, types.Callbac
     stars_traffic_packages = getattr(settings, "stars_traffic_packages", {}) or {}
     traffic_mode = bool(getattr(settings, "traffic_sale_mode", False) or stars_traffic_packages)
 
+    options_are_stars = False
     if traffic_mode:
         if traffic_packages:
             options = traffic_packages
         elif stars_traffic_packages:
             options = stars_traffic_packages
             currency_symbol_val = "⭐"
+            options_are_stars = True
         else:
             options = {}
     else:
         options = settings.subscription_options
 
-    if options:
+    display_options = options
+    if options and promo_code_service:
+        try:
+            active_discount_info = await promo_code_service.get_user_active_discount(
+                session, event.from_user.id
+            )
+        except Exception:
+            active_discount_info = None
+        if active_discount_info:
+            discount_pct, _promo_code = active_discount_info
+            discounted_options = {}
+            for period, price in options.items():
+                if price is None:
+                    discounted_options[period] = price
+                else:
+                    discounted_price, _ = promo_code_service.calculate_discounted_price(
+                        price, discount_pct
+                    )
+                    if options_are_stars:
+                        discounted_price = math.ceil(discounted_price)
+                    discounted_options[period] = discounted_price
+            display_options = discounted_options
+
+    if display_options:
         text_content = get_text("select_traffic_package") if traffic_mode else get_text("select_subscription_period")
         reply_markup = get_subscription_options_keyboard(
-            options, currency_symbol_val, current_lang, i18n, traffic_mode=traffic_mode
+            display_options, currency_symbol_val, current_lang, i18n, traffic_mode=traffic_mode
         )
     else:
         text_content = get_text("no_subscription_options_available")
@@ -104,8 +136,16 @@ async def display_subscription_options(event: Union[types.Message, types.Callbac
 
 
 @router.callback_query(F.data == "main_action:subscribe")
-async def reshow_subscription_options_callback(callback: types.CallbackQuery, i18n_data: dict, settings: Settings, session: AsyncSession):
-    await display_subscription_options(callback, i18n_data, settings, session)
+async def reshow_subscription_options_callback(
+    callback: types.CallbackQuery,
+    i18n_data: dict,
+    settings: Settings,
+    session: AsyncSession,
+    promo_code_service=None,
+):
+    await display_subscription_options(
+        callback, i18n_data, settings, session, promo_code_service=promo_code_service
+    )
 
 
 async def my_subscription_command_handler(
diff --git a/bot/handlers/user/subscription/payments_subscription.py b/bot/handlers/user/subscription/payments_subscription.py
index 5cda93d..95470dd 100644
--- a/bot/handlers/user/subscription/payments_subscription.py
+++ b/bot/handlers/user/subscription/payments_subscription.py
@@ -1,4 +1,5 @@
 import logging
+import math
 from typing import Optional
 
 from aiogram import F, Router, types
@@ -52,26 +53,45 @@ async def select_subscription_period_callback_handler(
 
     # Check for active discount and apply if exists
     discount_text = ""
-    if promo_code_service and price_rub:
+    if promo_code_service and (price_rub is not None or stars_price is not None):
         active_discount_info = await promo_code_service.get_user_active_discount(
             session, callback.from_user.id
         )
 
         if active_discount_info:
             discount_pct, promo_code = active_discount_info
-            original_price_rub = price_rub
-            price_rub, discount_amt = promo_code_service.calculate_discounted_price(
-                price_rub, discount_pct
-            )
-            discount_text = get_text(
-                "active_discount_notice",
-                code=promo_code,
-                discount_pct=discount_pct,
-                original_price=original_price_rub,
-                discounted_price=price_rub,
-                discount_amount=discount_amt
-            )
-            # Note: Stars prices typically don't get discounts (can be added if needed)
+            if price_rub is not None:
+                original_price_rub = price_rub
+                price_rub, discount_amt = promo_code_service.calculate_discounted_price(
+                    price_rub, discount_pct
+                )
+                discount_text = get_text(
+                    "active_discount_notice",
+                    code=promo_code,
+                    discount_pct=discount_pct,
+                    original_price=original_price_rub,
+                    discounted_price=price_rub,
+                    discount_amount=discount_amt,
+                    currency_symbol=currency_symbol_val,
+                )
+            if stars_price is not None:
+                original_stars_price = stars_price
+                discounted_stars_price, _ = promo_code_service.calculate_discounted_price(
+                    float(stars_price), discount_pct
+                )
+                discounted_stars_price = math.ceil(discounted_stars_price)
+                stars_price = discounted_stars_price
+                if not discount_text:
+                    discount_amt = original_stars_price - discounted_stars_price
+                    discount_text = get_text(
+                        "active_discount_notice",
+                        code=promo_code,
+                        discount_pct=discount_pct,
+                        original_price=original_stars_price,
+                        discounted_price=discounted_stars_price,
+                        discount_amount=discount_amt,
+                        currency_symbol="⭐",
+                    )
 
     if price_rub is None:
         if traffic_mode and not price_source and stars_price is not None:
diff --git a/bot/handlers/user/subscription/payments_yookassa.py b/bot/handlers/user/subscription/payments_yookassa.py
index 807bcfd..218ee14 100644
--- a/bot/handlers/user/subscription/payments_yookassa.py
+++ b/bot/handlers/user/subscription/payments_yookassa.py
@@ -88,13 +88,35 @@ async def _initiate_yk_payment(
         if active_discount:
             # Price is already discounted, calculate original price backwards
             discount_pct = active_discount.discount_percentage
-            original_price = price_rub / (1 - discount_pct / 100)
-            discount_amount = original_price - price_rub
             active_promo_code_id = active_discount.promo_code_id
-            logging.info(
-                f"Recording {discount_pct}% discount for YooKassa payment: "
-                f"original {original_price:.2f} -> final {price_rub}"
-            )
+            denominator = 1 - discount_pct / 100
+            if denominator <= 0:
+                price_source = (
+                    getattr(settings, "traffic_packages", {}) or {}
+                    if sale_mode == "traffic"
+                    else (settings.subscription_options or {})
+                )
+                fallback_original = price_source.get(months)
+                if fallback_original is not None:
+                    original_price = fallback_original
+                    discount_amount = original_price - price_rub
+                    logging.info(
+                        f"Recording {discount_pct}% discount for YooKassa payment: "
+                        f"original {original_price:.2f} -> final {price_rub}"
+                    )
+                else:
+                    logging.warning(
+                        "YooKassa discount %s%% has invalid denominator and no fallback price for months=%s.",
+                        discount_pct,
+                        months,
+                    )
+            else:
+                original_price = price_rub / denominator
+                discount_amount = original_price - price_rub
+                logging.info(
+                    f"Recording {discount_pct}% discount for YooKassa payment: "
+                    f"original {original_price:.2f} -> final {price_rub}"
+                )
 
     payment_description = (
         get_text("payment_description_traffic", traffic_gb=_format_value(months))
diff --git a/bot/services/crypto_pay_service.py b/bot/services/crypto_pay_service.py
index 679024b..d98c453 100644
--- a/bot/services/crypto_pay_service.py
+++ b/bot/services/crypto_pay_service.py
@@ -82,13 +82,35 @@ class CryptoPayService:
             if active_discount:
                 # Price is already discounted, calculate original price backwards
                 discount_pct = active_discount.discount_percentage
-                original_amount = amount / (1 - discount_pct / 100)
-                discount_amount = original_amount - amount
                 promo_code_id = active_discount.promo_code_id
-                logging.info(
-                    f"Recording {discount_pct}% discount for CryptoPay payment: "
-                    f"original {original_amount:.2f} -> final {amount}"
-                )
+                denominator = 1 - discount_pct / 100
+                if denominator <= 0:
+                    price_source = (
+                        getattr(self.settings, "traffic_packages", {}) or {}
+                        if sale_mode == "traffic"
+                        else (self.settings.subscription_options or {})
+                    )
+                    fallback_original = price_source.get(months)
+                    if fallback_original is not None:
+                        original_amount = fallback_original
+                        discount_amount = original_amount - amount
+                        logging.info(
+                            f"Recording {discount_pct}% discount for CryptoPay payment: "
+                            f"original {original_amount:.2f} -> final {amount}"
+                        )
+                    else:
+                        logging.warning(
+                            "CryptoPay discount %s%% has invalid denominator and no fallback price for months=%s.",
+                            discount_pct,
+                            months,
+                        )
+                else:
+                    original_amount = amount / denominator
+                    discount_amount = original_amount - amount
+                    logging.info(
+                        f"Recording {discount_pct}% discount for CryptoPay payment: "
+                        f"original {original_amount:.2f} -> final {amount}"
+                    )
 
         # Create pending payment in DB and commit to persist
         try:
diff --git a/bot/services/freekassa_service.py b/bot/services/freekassa_service.py
index b50b515..2bcde66 100644
--- a/bot/services/freekassa_service.py
+++ b/bot/services/freekassa_service.py
@@ -96,13 +96,36 @@ class FreeKassaService:
             if active_discount:
                 # Price is already discounted, calculate original price backwards
                 discount_pct = active_discount.discount_percentage
-                original_amount = amount / (1 - discount_pct / 100)
-                discount_amount = original_amount - amount
                 promo_code_id = active_discount.promo_code_id
-                logging.info(
-                    f"Recording {discount_pct}% discount for FreeKassa payment: "
-                    f"original {original_amount:.2f} -> final {amount}"
-                )
+                denominator = 1 - discount_pct / 100
+                if denominator <= 0:
+                    traffic_mode = bool(getattr(self.settings, "traffic_sale_mode", False))
+                    price_source = (
+                        getattr(self.settings, "traffic_packages", {}) or {}
+                        if traffic_mode
+                        else (self.settings.subscription_options or {})
+                    )
+                    fallback_original = price_source.get(months)
+                    if fallback_original is not None:
+                        original_amount = fallback_original
+                        discount_amount = original_amount - amount
+                        logging.info(
+                            f"Recording {discount_pct}% discount for FreeKassa payment: "
+                            f"original {original_amount:.2f} -> final {amount}"
+                        )
+                    else:
+                        logging.warning(
+                            "FreeKassa discount %s%% has invalid denominator and no fallback price for months=%s.",
+                            discount_pct,
+                            months,
+                        )
+                else:
+                    original_amount = amount / denominator
+                    discount_amount = original_amount - amount
+                    logging.info(
+                        f"Recording {discount_pct}% discount for FreeKassa payment: "
+                        f"original {original_amount:.2f} -> final {amount}"
+                    )
 
                 # Update payment record with discount metadata
                 try:
diff --git a/bot/services/platega_service.py b/bot/services/platega_service.py
index 1fd8c8b..24ff38e 100644
--- a/bot/services/platega_service.py
+++ b/bot/services/platega_service.py
@@ -94,13 +94,36 @@ class PlategaService:
             if active_discount:
                 # Price is already discounted, calculate original price backwards
                 discount_pct = active_discount.discount_percentage
-                original_amount = amount / (1 - discount_pct / 100)
-                discount_amount = original_amount - amount
                 promo_code_id = active_discount.promo_code_id
-                logging.info(
-                    f"Recording {discount_pct}% discount for Platega payment: "
-                    f"original {original_amount:.2f} -> final {amount}"
-                )
+                denominator = 1 - discount_pct / 100
+                if denominator <= 0:
+                    traffic_mode = bool(getattr(self.settings, "traffic_sale_mode", False))
+                    price_source = (
+                        getattr(self.settings, "traffic_packages", {}) or {}
+                        if traffic_mode
+                        else (self.settings.subscription_options or {})
+                    )
+                    fallback_original = price_source.get(months)
+                    if fallback_original is not None:
+                        original_amount = fallback_original
+                        discount_amount = original_amount - amount
+                        logging.info(
+                            f"Recording {discount_pct}% discount for Platega payment: "
+                            f"original {original_amount:.2f} -> final {amount}"
+                        )
+                    else:
+                        logging.warning(
+                            "Platega discount %s%% has invalid denominator and no fallback price for months=%s.",
+                            discount_pct,
+                            months,
+                        )
+                else:
+                    original_amount = amount / denominator
+                    discount_amount = original_amount - amount
+                    logging.info(
+                        f"Recording {discount_pct}% discount for Platega payment: "
+                        f"original {original_amount:.2f} -> final {amount}"
+                    )
 
                 # Update payment record with discount metadata
                 try:
diff --git a/bot/services/promo_code_service.py b/bot/services/promo_code_service.py
index e56cea9..3fb90ad 100644
--- a/bot/services/promo_code_service.py
+++ b/bot/services/promo_code_service.py
@@ -6,7 +6,7 @@ from aiogram import Bot
 
 from config.settings import Settings
 
-from db.dal import promo_code_dal, user_dal, active_discount_dal
+from db.dal import promo_code_dal, user_dal, active_discount_dal, payment_dal
 from db.models import PromoCode, User
 
 from .subscription_service import SubscriptionService
@@ -206,40 +206,88 @@ class PromoCodeService:
         payment_id: int
     ) -> bool:
         """
-        Consume active discount: record activation, increment usage, clear active discount.
+        Consume active discount: link activation to payment, increment usage, clear active discount.
         Call this AFTER successful payment.
         """
+        payment_record = await payment_dal.get_payment_by_db_id(session, payment_id)
+        if not payment_record:
+            logging.warning(
+                "Payment %s not found for discount consumption (user %s).",
+                payment_id,
+                user_id,
+            )
+            return False
+
+        if not payment_record.discount_applied:
+            return False
+
+        promo_code_id = payment_record.promo_code_id
+        if not promo_code_id:
+            logging.warning(
+                "Payment %s for user %s has discount_applied but no promo_code_id.",
+                payment_id,
+                user_id,
+            )
+            return False
+
         active_discount = await active_discount_dal.get_active_discount(session, user_id)
-        if not active_discount:
-            return False
-
-        # Record activation
-        activation_recorded = await promo_code_dal.record_promo_activation(
-            session,
-            active_discount.promo_code_id,
-            user_id,
-            payment_id=payment_id
-        )
-
-        # Increment usage
-        promo_incremented = await promo_code_dal.increment_promo_code_usage(
-            session,
-            active_discount.promo_code_id
-        )
-
-        # Clear active discount
-        await active_discount_dal.clear_active_discount(session, user_id)
-
-        if activation_recorded and promo_incremented:
-            await session.flush()
+        if active_discount and active_discount.promo_code_id != promo_code_id:
             logging.info(
-                f"Discount consumed for user {user_id}, promo {active_discount.promo_code_id}, "
-                f"payment {payment_id}"
+                "Active discount promo %s differs from payment promo %s; leaving active discount intact.",
+                active_discount.promo_code_id,
+                promo_code_id,
             )
-            return True
+            active_discount = None
+
+        existing_activation = await promo_code_dal.get_user_activation_for_promo(
+            session, promo_code_id, user_id
+        )
+        if existing_activation:
+            if existing_activation.payment_id is None:
+                updated_payment = await promo_code_dal.set_activation_payment_id(
+                    session, promo_code_id, user_id, payment_id
+                )
+                if updated_payment:
+                    logging.info(
+                        "Linked discount promo %s activation to payment %s for user %s.",
+                        promo_code_id,
+                        payment_id,
+                        user_id,
+                    )
         else:
-            logging.error(
-                f"Failed to consume discount for user {user_id}, "
-                f"promo {active_discount.promo_code_id}"
+            activation_recorded = await promo_code_dal.record_promo_activation(
+                session,
+                promo_code_id,
+                user_id,
+                payment_id=payment_id,
             )
-            return False
+            if not activation_recorded:
+                logging.error(
+                    "Failed to record discount activation for user %s, promo %s.",
+                    user_id,
+                    promo_code_id,
+                )
+                return False
+
+            promo_incremented = await promo_code_dal.increment_promo_code_usage(
+                session, promo_code_id, allow_overflow=True
+            )
+            if not promo_incremented:
+                logging.error(
+                    "Failed to increment discount usage for user %s, promo %s.",
+                    user_id,
+                    promo_code_id,
+                )
+                return False
+
+        if active_discount and active_discount.promo_code_id == promo_code_id:
+            await active_discount_dal.clear_active_discount(session, user_id)
+
+        await session.flush()
+        logging.info(
+            "Discount consumed for user %s, promo %s, payment %s",
+            user_id,
+            promo_code_id,
+            payment_id,
+        )
+        return True
diff --git a/bot/services/severpay_service.py b/bot/services/severpay_service.py
index 9efa1e5..dac68f7 100644
--- a/bot/services/severpay_service.py
+++ b/bot/services/severpay_service.py
@@ -117,13 +117,36 @@ class SeverPayService:
             if active_discount:
                 # Price is already discounted, calculate original price backwards
                 discount_pct = active_discount.discount_percentage
-                original_amount = amount / (1 - discount_pct / 100)
-                discount_amount = original_amount - amount
                 promo_code_id = active_discount.promo_code_id
-                logging.info(
-                    f"Recording {discount_pct}% discount for SeverPay payment: "
-                    f"original {original_amount:.2f} -> final {amount}"
-                )
+                denominator = 1 - discount_pct / 100
+                if denominator <= 0:
+                    traffic_mode = bool(getattr(self.settings, "traffic_sale_mode", False))
+                    price_source = (
+                        getattr(self.settings, "traffic_packages", {}) or {}
+                        if traffic_mode
+                        else (self.settings.subscription_options or {})
+                    )
+                    fallback_original = price_source.get(months)
+                    if fallback_original is not None:
+                        original_amount = fallback_original
+                        discount_amount = original_amount - amount
+                        logging.info(
+                            f"Recording {discount_pct}% discount for SeverPay payment: "
+                            f"original {original_amount:.2f} -> final {amount}"
+                        )
+                    else:
+                        logging.warning(
+                            "SeverPay discount %s%% has invalid denominator and no fallback price for months=%s.",
+                            discount_pct,
+                            months,
+                        )
+                else:
+                    original_amount = amount / denominator
+                    discount_amount = original_amount - amount
+                    logging.info(
+                        f"Recording {discount_pct}% discount for SeverPay payment: "
+                        f"original {original_amount:.2f} -> final {amount}"
+                    )
 
                 # Update payment record with discount metadata
                 try:
diff --git a/bot/services/subscription_service.py b/bot/services/subscription_service.py
index 847df40..dc34b6e 100644
--- a/bot/services/subscription_service.py
+++ b/bot/services/subscription_service.py
@@ -5,7 +5,7 @@ from typing import Optional, Dict, Any, List, Tuple
 from aiogram import Bot
 from bot.middlewares.i18n import JsonI18n
 
-from db.dal import user_dal, subscription_dal, promo_code_dal, payment_dal, user_billing_dal, active_discount_dal
+from db.dal import user_dal, subscription_dal, promo_code_dal, user_billing_dal
 from bot.utils.date_utils import add_months
 from bot.utils.config_link import prepare_config_links
 from db.models import User, Subscription
@@ -615,7 +615,7 @@ class SubscriptionService:
                 )
                 if activation:
                     await promo_code_dal.increment_promo_code_usage(
-                        session, promo_code_id_from_payment
+                        session, promo_code_id_from_payment, allow_overflow=True
                     )
                 else:
                     logging.warning(
@@ -691,33 +691,20 @@ class SubscriptionService:
         final_subscription_url = updated_panel_user.get("subscriptionUrl")
         final_panel_short_uuid = updated_panel_user.get("shortUuid", panel_short_uuid)
 
-        # NEW: Consume discount promo code if payment had one
+        # Consume discount promo code if payment had one
         try:
-            payment_record = await payment_dal.get_payment_by_db_id(session, payment_db_id)
-            if payment_record and payment_record.discount_applied:
-                # This payment had a discount applied - consume it
-                active_discount = await active_discount_dal.get_active_discount(session, user_id)
-                if active_discount:
-                    # Record promo activation
-                    await promo_code_dal.record_promo_activation(
-                        session,
-                        active_discount.promo_code_id,
-                        user_id,
-                        payment_id=payment_db_id
-                    )
-                    # Increment usage
-                    await promo_code_dal.increment_promo_code_usage(
-                        session,
-                        active_discount.promo_code_id
-                    )
-                    # Clear active discount
-                    await active_discount_dal.clear_active_discount(session, user_id)
-                    logging.info(
-                        f"Discount consumed for user {user_id}, promo {active_discount.promo_code_id}, "
-                        f"payment {payment_db_id}"
-                    )
+            promo_code_service = getattr(self, "promo_code_service", None)
+            if not promo_code_service:
+                from .promo_code_service import PromoCodeService
+
+                promo_code_service = PromoCodeService(
+                    self.settings, self, self.bot, self.i18n
+                )
+            await promo_code_service.consume_discount(session, user_id, payment_db_id)
         except Exception as e:
-            logging.error(f"Failed to consume discount for user {user_id}, payment {payment_db_id}: {e}")
+            logging.error(
+                f"Failed to consume discount for user {user_id}, payment {payment_db_id}: {e}"
+            )
             # Don't fail the subscription activation if discount consumption fails
 
         return {
diff --git a/db/dal/promo_code_dal.py b/db/dal/promo_code_dal.py
index 1f1902e..569380b 100644
--- a/db/dal/promo_code_dal.py
+++ b/db/dal/promo_code_dal.py
@@ -159,22 +159,51 @@ async def delete_promo_code(session: AsyncSession, promo_id: int) -> Optional[Pr
 
 
 async def increment_promo_code_usage(
-        session: AsyncSession, promo_code_id: int) -> Optional[PromoCode]:
+        session: AsyncSession,
+        promo_code_id: int,
+        allow_overflow: bool = False) -> Optional[PromoCode]:
+    conditions = [PromoCode.promo_code_id == promo_code_id]
+    if not allow_overflow:
+        conditions.append(PromoCode.current_activations < PromoCode.max_activations)
+
+    stmt = (
+        update(PromoCode)
+        .where(*conditions)
+        .values(current_activations=PromoCode.current_activations + 1)
+    )
+    result = await session.execute(stmt)
+    if result.rowcount and result.rowcount > 0:
+        await session.flush()
+        return await get_promo_code_by_id(session, promo_code_id)
+
     promo = await get_promo_code_by_id(session, promo_code_id)
     if promo:
-        if promo.current_activations < promo.max_activations:
-            promo.current_activations += 1
-            await session.flush()
-            await session.refresh(promo)
-            return promo
+        if allow_overflow:
+            logging.warning(
+                f"Failed to increment promo usage for promo {promo.code} (ID: {promo_code_id})."
+            )
         else:
             logging.warning(
                 f"Promo code {promo.code} (ID: {promo_code_id}) already reached max activations."
             )
-            return None
     return None
 
 
+async def decrement_promo_code_usage(
+        session: AsyncSession, promo_code_id: int) -> bool:
+    stmt = (
+        update(PromoCode)
+        .where(
+            PromoCode.promo_code_id == promo_code_id,
+            PromoCode.current_activations > 0,
+        )
+        .values(current_activations=PromoCode.current_activations - 1)
+    )
+    result = await session.execute(stmt)
+    await session.flush()
+    return bool(result.rowcount and result.rowcount > 0)
+
+
 async def get_user_activation_for_promo(
         session: AsyncSession, promo_code_id: int,
         user_id: int) -> Optional[PromoCodeActivation]:
@@ -230,3 +259,22 @@ async def record_promo_activation(
         f"Promo code {promo_code_id} activated by user {user_id}. Activation ID: {new_activation.activation_id}"
     )
     return new_activation
+
+
+async def set_activation_payment_id(
+        session: AsyncSession,
+        promo_code_id: int,
+        user_id: int,
+        payment_id: int) -> bool:
+    stmt = (
+        update(PromoCodeActivation)
+        .where(
+            PromoCodeActivation.promo_code_id == promo_code_id,
+            PromoCodeActivation.user_id == user_id,
+            PromoCodeActivation.payment_id == None,
+        )
+        .values(payment_id=payment_id)
+    )
+    result = await session.execute(stmt)
+    await session.flush()
+    return bool(result.rowcount and result.rowcount > 0)
diff --git a/db/migrator.py b/db/migrator.py
index e385f3b..18bb209 100644
--- a/db/migrator.py
+++ b/db/migrator.py
@@ -168,6 +168,48 @@ def _migration_0004_add_discount_promo_codes(connection: Connection) -> None:
         )
     )
 
+
+def _migration_0005_fix_active_discounts_fk_cascade(connection: Connection) -> None:
+    inspector = inspect(connection)
+    if not inspector.has_table("active_discounts"):
+        return
+
+    connection.execute(
+        text(
+            "DELETE FROM active_discounts ad "
+            "WHERE NOT EXISTS (SELECT 1 FROM users u WHERE u.user_id = ad.user_id) "
+            "OR NOT EXISTS (SELECT 1 FROM promo_codes p WHERE p.promo_code_id = ad.promo_code_id)"
+        )
+    )
+
+    connection.execute(
+        text("ALTER TABLE active_discounts DROP CONSTRAINT IF EXISTS active_discounts_user_id_fkey")
+    )
+    connection.execute(
+        text("ALTER TABLE active_discounts DROP CONSTRAINT IF EXISTS fk_active_discounts_user")
+    )
+    connection.execute(
+        text("ALTER TABLE active_discounts DROP CONSTRAINT IF EXISTS active_discounts_promo_code_id_fkey")
+    )
+    connection.execute(
+        text("ALTER TABLE active_discounts DROP CONSTRAINT IF EXISTS fk_active_discounts_promo_code")
+    )
+
+    connection.execute(
+        text(
+            "ALTER TABLE active_discounts "
+            "ADD CONSTRAINT fk_active_discounts_user "
+            "FOREIGN KEY (user_id) REFERENCES users (user_id) ON DELETE CASCADE"
+        )
+    )
+    connection.execute(
+        text(
+            "ALTER TABLE active_discounts "
+            "ADD CONSTRAINT fk_active_discounts_promo_code "
+            "FOREIGN KEY (promo_code_id) REFERENCES promo_codes (promo_code_id) ON DELETE CASCADE"
+        )
+    )
+
 MIGRATIONS: List[Migration] = [
     Migration(
         id="0001_add_channel_subscription_fields",
@@ -189,6 +231,11 @@ MIGRATIONS: List[Migration] = [
         description="Add support for percentage discount promo codes",
         upgrade=_migration_0004_add_discount_promo_codes,
     ),
+    Migration(
+        id="0005_fix_active_discounts_fk_cascade",
+        description="Ensure active_discounts FKs cascade on user/promo delete",
+        upgrade=_migration_0005_fix_active_discounts_fk_cascade,
+    ),
 ]
 
 
diff --git a/db/models.py b/db/models.py
index 5547f20..cc55132 100644
--- a/db/models.py
+++ b/db/models.py
@@ -210,8 +210,16 @@ class ActiveDiscount(Base):
     """Tracks pending discount promo codes awaiting payment (permanent until used)"""
     __tablename__ = "active_discounts"
 
-    user_id = Column(BigInteger, ForeignKey("users.user_id"), primary_key=True)
-    promo_code_id = Column(Integer, ForeignKey("promo_codes.promo_code_id"), nullable=False)
+    user_id = Column(
+        BigInteger,
+        ForeignKey("users.user_id", ondelete="CASCADE"),
+        primary_key=True,
+    )
+    promo_code_id = Column(
+        Integer,
+        ForeignKey("promo_codes.promo_code_id", ondelete="CASCADE"),
+        nullable=False,
+    )
     discount_percentage = Column(Integer, nullable=False)
     activated_at = Column(DateTime(timezone=True), server_default=func.now())
 
diff --git a/locales/en.json b/locales/en.json
index d6a3b9f..65298d5 100644
--- a/locales/en.json
+++ b/locales/en.json
@@ -79,7 +79,7 @@
   "discount_promo_code_applied_success": "✅ Promo code <code>{code}</code> activated!\n\n💰 A {discount}% discount will be applied to your next purchase.\n\nSelect a plan for payment.",
   "discount_promo_already_active": "❌ You already have an active discount promo code (<code>{code}</code>, -{discount_pct}%). Use it first or wait until the payment is complete.",
   "promo_code_not_found_or_not_discount": "❌ Promo code <code>{code}</code> not found or is invalid.",
-  "active_discount_notice": "🎁 Active discount: <code>{code}</code> (-{discount_pct}%)\n💵 Price: <s>{original_price}</s> ➔ <b>{discounted_price}</b>\n💰 Savings: {discount_amount}",
+  "active_discount_notice": "🎁 Active discount: <code>{code}</code> (-{discount_pct}%)\n💵 Price: <s>{original_price}{currency_symbol}</s> ➔ <b>{discounted_price}{currency_symbol}</b>\n💰 Savings: {discount_amount}{currency_symbol}",
   "error_applying_promo_bonus": "Failed to apply promo bonus. Please try again later or contact support.",
   "promo_input_cancelled_short": "Promo code entry cancelled.",
   "trial_feature_disabled": "Free trial is currently unavailable.",
diff --git a/locales/ru.json b/locales/ru.json
index a9de522..6d19cf1 100644
--- a/locales/ru.json
+++ b/locales/ru.json
@@ -79,7 +79,7 @@
   "discount_promo_code_applied_success": "✅ Промокод <code>{code}</code> активирован!\n\n💰 Скидка {discount}% будет применена к вашей следующей покупке.\n\nВыберите тариф для оплаты.",
   "discount_promo_already_active": "❌ У вас уже есть активированный промокод на скидку (<code>{code}</code>, -{discount_pct}%). Используйте его сначала или дождитесь окончания платежа.",
   "promo_code_not_found_or_not_discount": "❌ Промокод <code>{code}</code> не найден или недействителен.",
-  "active_discount_notice": "🎁 Активна скидка: <code>{code}</code> (-{discount_pct}%)\n💵 Цена: <s>{original_price}</s> ➔ <b>{discounted_price}</b>\n💰 Экономия: {discount_amount}",
+  "active_discount_notice": "🎁 Активна скидка: <code>{code}</code> (-{discount_pct}%)\n💵 Цена: <s>{original_price}{currency_symbol}</s> ➔ <b>{discounted_price}{currency_symbol}</b>\n💰 Экономия: {discount_amount}{currency_symbol}",
   "error_applying_promo_bonus": "Не удалось применить бонус по промокоду. Пожалуйста, попробуйте позже или свяжитесь с поддержкой.",
   "error_applying_promo_discount": "❌ Ошибка при активации промокода. Попробуйте позже.",
   "promo_input_cancelled_short": "Ввод промокода отменен.",