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

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

If Apple billed your SuperGrok subscription, visit reportaproblem.apple.com to request a refund. Go to Settings > your name > Subscriptions on your iPhone to manage or cancel, but remember canceling won’t refund past charges