To cancel Grok, be sure to stop your subscription through the same billing...

https://touch-wiki.win/index.php/How_Do_I_Get_a_Google_Play_Refund_for_SuperGrok_Within_48_Hours%3F

To cancel Grok, be sure to stop your subscription through the same billing channel you originally used—whether that’s grok.com via Stripe, Apple Subscriptions, Google Play, X Premium on x.com, or console.x.ai for Business/API