Downloading past purchases from the iTunes Store, App Store, and iBooks Store
For some strange reason my past purchases were not being displayed in my itunes, after a little bit of searching I found this support article which explains what to do in order to show your past purchases and download them.
In my case I has to enable the “Show itunes in the cloud purchases” option in iTunes -> Preferences .
Hope this link helps you to avoid frustration and download your favourite music. Christmas Music in my case as Christmas is less than a month away 🙂