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

https://garrettsbestblogs.theglensecret.com/how-do-i-cancel-and-refund-supergrok-if-i-have-both-iphone-and-ipad

If Apple billed your SuperGrok subscription, visit reportaproblem.apple.com to request a refund. Go to the iOS Subscriptions section to find your purchase and submit your refund reason