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

https://wiki-book.win/index.php/Is_There_a_Faster_Way_to_Get_an_Apple_Refund_for_SuperGrok%3F

If Apple billed your SuperGrok subscription by mistake, visit reportaproblem.apple.com to request a refund. On your iPhone, go to Settings > your name > Subscriptions to manage or cancel