iTunes did not download full album that I bought

I bought an album today and as the was being downloaded onto my computer a warning came up and said I was low on disk space and had to delete stuff to open up space. When that warning occured there were 2 of the 11 songs were downloaded, then it stopped and did not begin after after I cleared the space. So pretty much I paid $10 for 2 songs and want either the remaining 9 songs or my money back. Anyway to do this?