@kayvmac
Normally this happens when a duplicate account exists, one with a spotify username / password and one with your facebook details.
Login to the website to check the status of your subscription here:
If everything's ok, logout in your phone, and be sure to use the same login information you used for the website to login in your phone. It's the one with the Premium features.
osorniosRock Star 24
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Note: I'm not a Spotify employee.