Question About Student Subscription Payment Options

Please go to Adobe Customer Service (make sure to sign into your Adobe account first) :
https://helpx.adobe.com/contact.html?rghtup=autoOpen will automatically open the chat window.
Type "Agent" in the chat box to bypass the chatbot and be connected to a person.

You may also be able to contact Adobe by phone:
https://helpx.adobe.com/contact/phone.html

The thing is, I stopped using it on April, I forgot to cancel the payment and usage of the app (or I may not remember it was an recurring payment), but it seems it's still recurring every month on my bank account until now (even though it said it was cancelled via my Gmail account on May). I'm still trying to understand the concept of this money-related thing with bank accounts.