Bad service and client treament

We bought a mercedese270cdi on20 feb from this car dealer and was told to drive the car for the weekend and check if there was any faults and was promised that all will be repaired , on tuesday we returned the car and pointed out the faults again we were promised that all will be sorted within a day or two only on friday we went to collect the car but needles to say nothing was done , a week later we have to keep on calling and try to find out when the faults will be repaired only to get excuses the past week the car went back again on wednesday again no feed back no word from the salesperson and we need to keep on calling on friday i went to fetch the car with a new excuse just to be told to return the car again on monday needles to say no repairs was done after 21 days the car was at the garage for 7 day , this is just promises and nothing gets done it is dealers like this that gives the second hand car trade a bad name please avoid doing bussines with this dealer BAD BAD !!!!