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

https://quebeck-wiki.win/index.php/I_Can%27t_Find_the_SuperGrok_Invoice_Number,_Where_Is_It%3F

If Apple billed your SuperGrok subscription by mistake, visit reportaproblem.apple.com to request a refund directly from Apple. Remember, canceling your subscription in iOS Settings under Subscriptions stops future payments but doesn’t refund past charges