In the future it's best to have an expediter in China that can check the facts on the ground. Also you should not have to pay for manufacturing before the product is shipped or at least checked by an independent contact in China. Usually terms are around 30-90 days depending on the industry and product (sometimes up to 6 months).
I put up a manufacturing guide a few months ago where I talked a bit about this: http://news.ycombinator.com/item?id=1840896