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Got the 3 months promotion, now when I connect Facbook, the premium account disapears...how is that?
I suggest you contact support so they can take a look at your account and see what is going on: https://www.spotify.com/about-us/contact/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.
Support usually replies within 24-48 hours.