Haval Bad Quality on Paint Job

I have encountered defective work on the Chrome Plated Chrome Trimmer on my car and grill.I was advised it's the products I am using on my car.My other cars are washed with the exact same products and nothing is wrong.The other trim Plates on the Haval are all in good order there is nothing wrong with it.So how can the products be blamed. I emailed Haval about 3 times and received no response not even an automated response. A mechanic told me it's the products I am using, he is not even a qualified paint specialist. The black on the grill is not damaged only the chrome,so does it make sense that the black on the grill is fine and the chrome is damaged by the product?