That doesn't sound good. Can you head to yoursubscription page? Your status should be Premium.
If you're on Premium, try signing out and back into the app. If that doesn't help, try a clean reinstallation. You can find how here.
If it says Free, check the receipt Spotify send to your email inbox. Make sure you're signing in with the username on that receipt. If the username on your receipt is a 10 digit number, please sign in with your Facebook login details.