If Apple billed your SuperGrok subscription, go to reportaproblem.apple.com to...

https://mega-wiki.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, go to reportaproblem.apple.com to request a refund. You can also check your iOS Settings under Subscriptions to manage or cancel it