Playlist gone

[metállat]

I have used spotify offline for about 2 months, i dont have wifi at home so i downloaded music at work, and i was happy with the results. Today i tried to download the more recent songs to my existing offline playlist, the music downloaded ok but after that my offline playlist was gone. It says waiting for download, and not available offline. What can i do? Redownloading spotify and the whole playlist is almost out of the question since my phone only has mobile internet which is very slow.