Got fixed playlists and lost my all previous songs

[Andurilefe]

Hello there. I've been using Spotify premium more than a year without any problem. Last week when i open app from my phone(as always) all my songs and lists are gone and some artists songs came to my lists but I am pretty sure that I didn't get them. I did erase them. After my next enter to app I saw that same songs, same lists and same last played songs again. I changed my password in that time but nothing changes. It repeats itself like this. Any idea? Sorry for the bad language and long post. Thanks