Syncing to offline mode on iPhone 5

[Justinkleeeee]

I have just re purchased spotify premium and had to go through and re sync my songs to offline mode . However once it got nearly halfway through, about 1000 songs , it stopped and won't sync anymore . I've got 8 gb storage on my phone left and obviously there is 3333 song limit which I have not reached. I deleted the app and reinstalled . It started working fine which was great . It then did the same thing again. I thought I'd delete and reinstall again and give it another chance . It worked but then failed again.please help, I don't want to have to cancel my subscription . Thank you