If Apple billed you for SuperGrok and you want a refund, visit...

https://wiki-aero.win/index.php/Can_Apple_Support_Help_If_I_Have_the_Receipt_Date_but_No_Invoice_Number%3F

If Apple billed you for SuperGrok and you want a refund, visit reportaproblem.apple.com to request it. Navigate to iOS Subscriptions for the SuperGrok purchase