Volkswagen Tiguan 2011: Leaking water pump

My wife's 2011 VW Tiguan has a leaking water pump and I was wondering what is fair when dealing with the manufacturer. While I can accept that the warranty period is over, the car has only done 40,000km. It has had every scheduled service but not many of them at the dealer, due to a poor customer service experience. They have only offered me 30 per cent off an $800 part with labour to cost as much again. I have asked for a better deal but have been told to take it or leave it. Is this fair in today's modern motoring environment?