This amazon audio thing was the worst. Somehow they were able to sneak me into some free trial that turned into a paid subscription. I found out I was paying for it, and wanted to cancel. I was abroad and no access to a desktop:

1. Not possible from a mobile browser.

2. Installed the app: not possible.

3. Put mobile browser into desktop rendering, and somewhere was able to get it to unsubscribe.

The worst of it all! EU should fine such practices.