If Apple billed your SuperGrok subscription by mistake, visit...

https://sierra-wiki.win/index.php/My_Apple_Subscription_Page_Won%27t_Load:_How_Can_I_Cancel_SuperGrok%3F

If Apple billed your SuperGrok subscription by mistake, visit reportaproblem.apple.com and sign in. Go to iOS Subscriptions, find SuperGrok, and request a refund. Remember, canceling the subscription stops future charges but doesn’t refund past payments