I bought an Audi A4 2.0 TDI S line in early 2008 with 1 previous owner its now 4 years old and the paint work has started to bubble and peel on the rear bumper and at the side of the boot. Audi have turned round to me and said its had a full re spray all down one side ? When I bought it I said specifically I wanted a car with no history. I've officially put a complaint in on my local dealers website and had no response after 2 days. How long should I leave it before going higher up to complain? Do I have a leg to stand on ? please advise.