If Apple billed your SuperGrok subscription, you can request a refund by...

https://instaquoteapp.com/why-does-apple-make-me-request-a-refund-separately-from-canceling/

If Apple billed your SuperGrok subscription, you can request a refund by visiting reportaproblem.apple.com and selecting the iOS Subscriptions section. Remember, canceling the subscription stops future charges but does not issue a refund automatically