Help - downloading problems

I have a couple of tracks and a video that will not download. The video tells me 'zero kb of 1.0 kb - stopped(err 8008)' in the Store Downloads box and the tracks have the same message with (err 10000) instaed of (err 8008). It tells me to go to Store/check for available downloads, but will not go any further during download than about 1 second and stops. If nobody can help, can anybody tell me how to contact apple to sort this out as the tracks are middle tracks in albums. Thanks for any help.