I'm just curious about your service, why pay someone 300 USD when you can manually delete all the Telegram Groups, Chats, Contacts, Channels, etc.? I don't get the point. It's not that hard. Actually, you swipe left and delete. You will be prompted if you want to leave the group/channel, and that's it.

I suggest you put more details about what your service is and what the clients could benefit from it.