Hi! I just payed for a new premium Spotify. I Was automaticly logged in with the same username and password, But all of my music were gone. So i logged out and deleted det app and then i reinstalled it and logged in again. All my music were back but i now i only have "free", even thou i paid for premium.
If you receive an automated email that leads you back to the community or help pages, reply to it (even if it's from "no-reply") and one of the Spotify team members will get back to you as soon as possible.