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

https://mill-wiki.win/index.php/SuperGrok_Refund_Request_Keeps_Spinning:_How_Do_I_Fix_It%3F

If Apple billed you for SuperGrok and you want a refund, visit reportaproblem.apple.com to request it. Navigate to iOS Subscriptions for the SuperGrok purchase