If Apple billed you for your SuperGrok subscription and you need a refund,...

https://www.kilobookmarks.win/to-cancel-grok-correctly-use-the-exact-billing-channel-you-subscribed

If Apple billed you for your SuperGrok subscription and you need a refund, visit reportaproblem.apple.com and sign in. Go to the iOS Subscriptions section, find SuperGrok, and request a refund there