If Apple billed your SuperGrok subscription and you want a refund, visit...

https://riversinterestingthoughtss.wpsuo.com/how-do-i-stop-supergrok-from-auto-renewing-on-ipad

If Apple billed your SuperGrok subscription and you want a refund, visit reportaproblem.apple.com and sign in with your Apple ID. Go to iOS Subscriptions, find SuperGrok, and request a refund