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

https://yenkee-wiki.win/index.php/Is_There_a_Difference_Between_Canceling_SuperGrok_and_Ending_It_Immediately%3F

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