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

https://wiki-wire.win/index.php/Where_Do_I_Go_to_Refund_a_SuperGrok_Subscription_on_iPhone%3F

If Apple billed you for a SuperGrok subscription and you want a refund, visit reportaproblem.apple.com to request it. Go to iOS Settings > your name > Subscriptions to manage or cancel your subscription