Range Rover SA failure to provide feedback on dama

We bought brand new Evoque in Merlyn Pretoria at the end of 2014. Last year towards the end of the year the car gave us problem, it actual stacked. The car is currently with the dealership since the 04th December till to date and they are failing to tell us what the problem is. I was adviced this morning by the service manager that he is actually s****ping the donor car and use the parts on my vehicle to check what the problem is. It's about time Range Rover replace this car with the new one, I can't pay for the car that I'm no longer using.