So i had a previous download going when i entered the code, and in trying to cancel it i accidentally canceled the classic pack download. How in the bloody hell do i restart it?

You should try re-entering the code when your other downloads are complete.

I tried re-entering the code, but it just says that the code has already been validated, and cannot be used again ( so at least i know the content has been assigned to my account)

Uhh, im on xbox if that helps any

Clear your system cache

not to sound like a old lady who is afraid to press ctrl-alt-f5 because somebody told her it will give her machine a virus, but are you being serious? I don't want to be that one kid who was tricked into magnetizing his hard drive....

Ok doesn't matter than ask people around it doesn't do what you say worked for me but nvm sir.