unhappy with the service.

On the 12 of March I took my car to BMW 320i registration VYS 149 GP to Zambezi BMW for overheating,and was advised that the coolant bottle is damaged,I bought the bottle for olmost R2000.00 and paid the labour of R1300.00.<br> Was given the car telling me it has been fixed,the car stared overheating the two days after it was service.<br> <br> I took the car back to the service at BMW Zambezi and pay R900.00 for diognosing the car and zwas also advised that I need to replaced the water pump,of which it cost R10,000 plus including labour, the car was released again saying it has been fixed,on the 24 of March 2016,I drove the car for 3 days and it starred overheating againg on the 27th an I got studied for olmost 4 hours, the car was taken back to them on the 29th and they have the car for 3 days till the 31st,given tbecar saying the problem is been resolved till when my wife studied again on the 3 of April when she was taking the kid to school in Witbank,while we were guaranteed that the problem is been resolve.<br> Please assist me in letting my car been fixed because that tells me that the parts that were replaced were still fine and one was taking chances.they should provide a catacy car .