Keep losing offline content?!

[Blogstrop]

At my wits end, first world problems and all that but keep downloading gigs of offline songs for the train (as mobile signal **bleep**) and for no reason they just go, have tried reinstalling app (resetting phone inbetween) formatting memory card, removing my phone as a listed device, redownloading offline stuff, i love spotify and i need it more than they need me but its useless to me unless i can have offline content. Help..