Thanks Matt, the problem is that we asked several times if the camera was under warranty and could it be fixed in Australia. Every time the manager of the camera section said yes.
Either she did not know and said that to get rid of us or she generally thought that, the problem should be addressed by a simple email from Royal Caribbean either by accepting responsibility or denying it, not replying to emails is not good customer service.
Consumer law must be different in America, here in Australia we take it back to the point of sale to have repairs or a refund for faulty merchandise, after all, my contract is with the seller, not the manufacturer.
Good lesson to be learnt by anyone sailing, don't expect normal warranty if you are sailing on an American ship that is not based in America. Will wait and see what happens.