Found some post on this, and it looks like a Spotify CSR posted to include the following information to help out.
If you continue to get this message please post below with these details:
My Question or Issue
Unable to log onto iphone Spotify app but went through the process of resetting password and clean install and able to log onto web. What i did notice today and what made sense with antoher person posting with this issue is that my account somehow is mixed with another country or user, I saw a lot of spanish channels and songs, playlist i never listen to.