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

https://www.bookmark-maker.win/if-you-want-a-refund-for-supergrok-first-check-exactly-who-charged

If you want a refund for SuperGrok, first make sure Apple actually charged you by checking your purchase history or iOS Subscriptions. Remember, simply canceling doesn’t give you a refund. To request one, go to reportaproblem.apple