Hi @Megzbo,
Your Premium and playlists are tied to your Spotify account which is stored remotely, so it should just be a case of logging in using the same details.
Double check your login on your new device, it is so easy to have two accounts unknowingly, one with a Spotify username and another using Facebook.
Hey there you, Yeah, you! 😁 Welcome - we're glad you joined the Spotify Community! While you here, let's have a fun game…