Hey @user-removed, welcome to the community!
Sounds like you might have created a brand new account in the process of logging into your Premium one.
Let's try following these steps to see if you find the Premium account. If you do, you can close the Free account to avoid future inconveniences.
Let me know how it goes.
“Music acts like a magic key, to which the most tightly closed heart opens.”
― Maria Augusta von Trapp