If Apple billed your SuperGrok subscription by mistake, visit...

https://www.bookmark-friend.win/to-cancel-grok-properly-make-sure-you-do-it-through-the-same-billing-channel

If Apple billed your SuperGrok subscription by mistake, visit reportaproblem.apple.com to request a refund. Open Settings on your iPhone, tap your name, then Subscriptions to manage SuperGrok