If Apple charged you for your SuperGrok subscription, visit...

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

If Apple charged you for your SuperGrok subscription, visit reportaproblem.apple.com to request a refund. Go to the iOS Subscriptions section, find SuperGrok, and follow the steps to report your issue