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

https://www.bookmark-xray.win/if-you-want-a-refund-for-supergrok-first-double-check-who-actually-billed

If you want a refund for SuperGrok, first make sure Apple actually billed you by checking your purchase history. Then, look under iOS Subscriptions to confirm your active charges