If you contact Shane Harris at Head Office on 03 9 3054000 he should be able to help you. Having the packaging and part numbers along with where you bought them will enable a quick find. Often the box will have the batch number on it so the more information you provide the quicker it gets resolved.
It is not a matter of a cheap chrome job but more in the preparation before plating. Taiwan is experiencing the same issues we have here with plating being an environmental concern.