If Apple billed your SuperGrok subscription, you can request a refund at...

https://wiki-room.win/index.php/What_Info_Should_I_Have_Ready_Before_Contacting_Apple_Support_for_a_Refund%3F

If Apple billed your SuperGrok subscription, you can request a refund at reportaproblem.apple.com. Go to your iOS Settings, tap your Apple ID, then Subscriptions to find SuperGrok