If you want a refund for SuperGrok, first make sure Apple actually billed you...

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 make sure Apple actually billed you by checking your purchase history or iOS Subscriptions. Remember, canceling the subscription won’t give you a refund automatically. To request one, visit reportaproblem.apple