I got a funny feeling your car was up for sale by one of ***** agent that is of Pakistani background (nothing wrong with that) and one of his A3 special. If it is, trust me, they will never own up to any problems arise and that's one of the things with importing - you copped all the risks and responsibility if anything pops up, such as your corroded head.
The best you can do is ask ***** to give you a discount or waive the agent fee next time when you wanted to import again.