unsubscribe app of acrobat

This forum system is not a direct link to Adobe support.
We are just users like you and can't help with account questions.
You need to contact Adobe directly through the Chat system at the link below.

https://helpx.adobe.com/contact/support.html

Select the chat icon at the bottom right of the page to open a chat session.
Type in AGENT into the chat window to connect directly to a person rather than the AI System.

But even if you contact Adobe they may Not be able to help you since you purchasedd it through the Apple iOS App store. Not sure, Don't know as I'm an android user.

Why IF you want to cancel the subscription do you still have it installed on your phone? I would think the first think you would do is uninstall the app from your phone.

Uninstall that proggram from your phone and go back to the App store and make sure you Cancel the subscription.

You can then install the Free iOS Acrobat READER App that, as far as I know, does not cost anything and allows you to Read PDF files.

Best of Luck