Telagram subscription management tool

I am looking for a Telegram automation which can manage subscriptions to private channel. Members will be making payments in Bitcoin or Ethereum. Need multiple payment options and when it reminds member about subscription end date a week in advance, then 3 days and then 24 hours. When member make the payment, it shows them a list of channels available to join, we have multiple channels and it gives subscription to all those channels. Also need an option to give trial period membership and discount codes.