If you want a refund for SuperGrok, first double-check who charged your...

https://www.slideserve.com/aaron_ward92/apple-refund-portal-not-working-on-safari-what-browser-should-i-try-next

If you want a refund for SuperGrok, first double-check who charged your account—sometimes it’s Apple, other times it may be third-party. Look at your iOS Subscriptions to confirm the billed service