There is currently an issue with logging in. I think the problem you are having is related to what is currently going on.
Spotify is currently looking into this and hopefully it will be fixed soon.
Thank you for your patience.
I suggest you contact support so they can help you https://support.spotify.com/contact-spotify-support/
If you get an automated reply email telling you to check the help section or the community, you need to reply back to it, even if it's from a no-reply address.
Support usually replies within 24-48 hours.
You are welcome @user-removed
If you have any other questions, I would be glad to answer them.
If you still have trouble with premium not working later, I suggest you contact support so they can look at your account to see what is causing the problem.
Have a good day!