What version of spotify are you using Free or Premium? Operating system? Device?
Also if im not mistaken you can right click on your old playlist and select to copy playlist link/url/embed code. Do that then send it to your facebook or email or just save it, then when you open your new spotify account just paste it in
I will try to explain it. I created a new account for my spotify premium. But I wanted to keep some of the playlists I had. At the moment of copying the internet connection on a computer dropped. Now on all my devices (Mobile and pc) it shows loading... With 0 tracks and I cant delete it.