Same thing happening to me. We've tried multiple accounts.
eXHozaLaFam - As you opened your account via Facebook you need to log in with your FB email/ password.
Have you tried shutting down Spotify and clicking on a music track within Facebook? This will launch Spotify with your account automatically logged in.
mvp1399 - Have you done a password reset for 'mvp1399' from right here: https://www.spotify.com/password-reset/