Changing phones
If you sign in to the same Telegram account on your new phone, your Inner Circle membership comes with you. You don't need a new invite.
Install Telegram on the new phone.
Sign in with the same phone number.
Open the PickBot Inner Circle from your chat list and turn on notifications. See Turn on Telegram notifications so you don't miss a pick.
Changing to a different Telegram account
Your access is tied to the Telegram account that joined. Your activation link and invite work only once, so they can't be reused for a new account.
Contact PickBot Support and tell them the email you used at checkout, your old Telegram username and your new one. See How to contact PickBot Support.
You left the channel and want back in
Leaving the channel does not cancel your subscription, but your one-time invite is already used. Contact PickBot Support with the email you used at checkout and your Telegram username, and ask for access again.