Telegram bot for adding to a closed channel by monthly subscription

Task:
Create a Telegram bot that will offer payment for access to a closed Telegram channel via a monthly subscription.
Payment methods: TON and regular payments via WayForPay (automatic monthly deduction from the card). In case a person does not pay for the subscription, the bot should remove the user from the private channel.

What has been done:
1) A user interaction funnel has been developed.
2) Integrated 2 methods of auto-payment via API:
TON and regular payments via WayForPay (automatic monthly deduction from the card).
3) A reminder system for users has been implemented, informing them a few days before the payment deadline.
4) A system for automatically removing users from the private channel in case of non-payment has been implemented, which helps maintain an up-to-date list of participants and prevents access without an active subscription.