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

https://mill-wiki.win/index.php/If_I_Cancel_OpenAI_API_Billing,_Will_My_ChatGPT_Plus_Cancel_Too%3F

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