Some items missing from my iTunes Purchase History

I purchased some audio books and movies on the iTunes store before (2-3 years ago).

But when I use the new iPhone 4S to look at my account, the "Purchased" show 1 audio book but doesn't show the other one I can clearly remember (in fact, I purchased that audio book twice, hoping the second time won't be any charge, but there was).

Also missing are some movies, such as Toy Story... Is the only thing I can do to contact Apple iTunes Store Customer Service to resolve this?

ok, the best way I found, is to use the Express Lane. Just google for: Apple Express Lane and you will find it.