If Apple billed your SuperGrok subscription, go to reportaproblem.apple.com to...

https://wiki-planet.win/index.php/What_Should_I_Do_If_I_Subscribed_on_Grok.com_but_Tried_to_Refund_on_Apple%3F

If Apple billed your SuperGrok subscription, go to reportaproblem.apple.com to request a refund. Navigate to the iOS Subscriptions section to find your purchase and submit the refund request