My username have changed since I've linked my Facebook account

[SaheMusic]

I use Spotify for sharing playlist as an artist, with my artistic user name. Since I linked my Facebook account, when I share a playlist, there appear my personal real name instead of my artistic name (as Spotify did in the past).

I've unlinked my Facebook account, but my real full name still appearing there, (and the username is impossible to change, and it changed itself!!) how could I recover my username?

In the playlist appears:

· Before linking my Spotify to Facebook:

"Created by Username"

· After linking my Spotify to Facebook:

"Created by My Real Full Name"

So please, I want to recover my privacity. Thanks.