To cancel your ChatGPT subscription, be sure to do it through the same billing...

https://wiki-club.win/index.php/Is_There_a_Cancel_Button_for_ChatGPT_Inside_the_iOS_App%3F

To cancel your ChatGPT subscription, be sure to do it through the same billing platform you used to subscribe—whether that’s the web (Stripe), Apple, Google Play, Business, or API