If Apple billed you for your SuperGrok subscription and you need a refund,...

https://garrettwigp625.tearosediner.net/what-does-report-a-problem-do-on-apple-purchases

If Apple billed you for your SuperGrok subscription and you need a refund, visit reportaproblem.apple.com and sign in. Go to the iOS Subscriptions section, find SuperGrok, and request a refund there