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

https://www.hotel-bookmarkings.win/to-cancel-grok-make-sure-you-do-it-through-the-exact-billing-channel-you-used

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