Best answer by Mathis
Firstly, please make sure you have a valid and confirmed email address set up on your account (I recommend doing this on a computer web browser). If you've never logged in with anything but the Facebook integration, please create a password that is unique for your SoundCloud account. You can do so here.
Once this is all set, you can disconnect your SoundCloud account entirely by following the steps we're outlining here on our help center.
All the best