Hi Stephan5C04,
Hope you are doing well.
Don’t worry, you can cancel the subscription from your end. Before we let you go do you mind sharing the reason for the cancellation?
For Android.
Google manages the Acrobat Reader premium subscription purchased from Google Play Store. You can cancel your subscription using the Google Play Store app on your Android devices.
For step-by-step instructions, see Cancel, pause, or change a subscription on Google Play.
For billing issues or a refund, see Get a refund on Google Play.
For more help, you can refer to https://helpx.adobe.com/acrobat/mobile-app-faq.html
Let us know how it works at your end. If you have any further queries please feel free to reach out to us.
Regards
Ria