Did you have a free 48 hour premium trial or did you subscribe?
If you had a 48 hour trial, your account will have reverted to free again after the trial ended. If you can't listen to music it could be because you have reached your 2.5 hour limit for the week if you have had your account for more than 6 months.
If you are still having issues, I would suggest you drop the team a message directly using the online contact form and someone will be able to assist you :)
Please bear in mind that the Community is not an official Spotify support service. It's a place where we all help each other, whether we work for Spotify or not. So please use your discretion when using the forum.