Songs in Playlist deleted HELP!

[banda]

I´ve been saving the best songs from my mix of the week in a separate playlist: weekly for over a year now. this week while adding a song it was suddenly empty, only the one new song added. 

in the faq-section i only found the solution to retrieve a deleted playlist. so i deleted the playlist, got it back, still with only the one song i added.

is there a way to get my precious songs back???