Hi @kivivcikadam, welcome to the Spotify Community!
In this case, we'd like you to try to log in by using your Facebook email address as username and password. Make sure not to use the Log in with Facebook option.
If you're still unable to access, go to your Facebook profile > Settings > Apps, and remove Spotify from the list. Once you've done that, you should be able to log in with the blue button to log in with Facebook.
Let us know how it goes.
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