I was using a trial version of office 365 (US version) which gave me 20GB extra skydrive storage, I then upgraded to Office 365 university subscription (through amazon UK). This is all through the same microsoft account. The office is working fine, but for some reason I have lost the extra 20GB of storage, and now I only have 7GB and can no longer upload anything. 

Spoke to tech support online for a while and they can't work out why this is happening, suggested I post on here to see if anyone has any ideas

Thanks for any help!!