Telegram bot for recurring subscription

The Telegram bot is implemented on Smart Sender with a recurring subscription feature (automatic deduction of funds from the bank card).
The payment system WayForPay is integrated.

Operating principle:
The user receives a welcome message, after which they receive a step-by-step "presentation" of all the privileges of being in the closed Telegram channel.
A free trial period of 14 days is provided.
3 days and 1 day before the end of the trial period, the user receives a warning about the need to pay for the subscription; otherwise, they will be automatically removed and blocked in the group.