Shipping cases can be some of the oddest when it comes to what you expect from the law, and what you get from the law. Having done some that work years ago, I can tell you that it sounds like you have a winnable case. However, it is imperative that you see someone who specializes in action involving the loss of goods in transport.
The law is complicated and although the facts expressed may seem to be all that is relevant, there may be many other important facts to consider. Also, the law is constantly undergoing change, so what may be correct today, may not be accurate tomorrow. Only a full consultation with an attorney experienced or knowledgeable in the specific legal subject matter is likely to result in the optimal course of action. My practice has entailed more than a 30 year span of many real estate, personal property, and bankruptcy issues. Find out more about me at: FloridaPropertyLitigation.com.
I agree with Mr. Russo. It sounds like you have a decent case, but the shipping rules and international aspect may make it a little tricky. Get an attorney involved soon. But whichever attorney you choose, make sure they consider the insurance aspect of the situation as there are bound to be multiple insurers involved and shipping cases often provide opportunities for insurance companies to use many of their exclusions in particular policies.