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

https://aged-wiki.win/index.php/How_Do_I_Stop_SuperGrok_from_Auto-Renewing_on_iPad%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