To cancel your ChatGPT subscription, make sure you do it through the same...

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

To cancel your ChatGPT subscription, make sure you do it through the same channel you used to sign up—whether that’s the web, Stripe, Apple, Google Play, Business, or API