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

https://wiki-mixer.win/index.php/I_Got_Charged_for_SuperGrok_and_I_Don%27t_Recognize_It_%E2%80%94_What_Now%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