Telegram bot for adding subscribers

Telegram bot in the programming language Python.
Functionality:

1. The user leaves their phone number, after which a message with payment details is sent.
3. Payment verification by the administrator (the client sends a payment screenshot to the bot, which is sent to the admin, who confirms it manually)
4. After confirmation, the user is added to a private group for a specified period (1 month).
5. Reminder about subscription expiration 3 days in advance.
6. Automatic removal of the subscriber from the channel after the subscription period ends.