You can delete your account on the radio.net website www.radio.net after logging in with your user name. (If you can't remember your password please click on the link 'Forgot password' and follow the steps provided.) You can access your profile by clicking on your photo / avatar on the top of the page. In "My profile" you can delete your account at the bottom right.
Please note: As we have removed the login from the apps in version 5.x, it is no longer possible to modify or delete your account in the app.