horrible service

I booked my new vehicle which I bought last year December 2017 and veh was due for a service at 96800km, called audi SA they approved my 90000km service and gave me a audi center to take the vehicle too. I then got a technician allocated to me whos name is golden and he assisted me over the phone around the 12th 13th December 2017 took my vehicle in for service around the 14th December, he then attended to my vehicle and done most of what I asked to be done, oil, dust covers repair brakes and fix covers at the bottom of the veh, I specifically asked him to check the water coolent as it was giving me a problem, says that everything is fine on the vehicle and that there should be no problems, I also mentioned that there is a shake on the vehicle while I drive around 100km and 120 km, said that it is due to the brakes, told him that there is a sound on the left of the car when I go over bumps like something is loose says that it was covers that was loose and not the suspension, took the car that day and drove half way only to find out that the oil cap was not placed properly on the veh, a lot of smoke started coming out of the vehicle and I stopped emmeditately, called audi and reported the incident, golden then came and assisted while parked on the highway and saw the problem, then said we should drive back and reset the oil lite, done a diagnostic test again and removed the oil lite, everything seems to be fine again, 2 weeks later left for cape town drove down with my family and while driving felt the shake on the vehicle still and the noise when going over bumps on the left as if the suspension or shocks are worn, when finally arrived at cape town the coolent light came on and said that I should check the levels, topped up the levels with coolent and continued to drive on, noticed that every 500km id have to top up the water level. came back to jhb the following week jan, called audi and explained to them that not everything was done on my vehicle as I requested, reception lady told me that bring the veh back on the 11th January as it is mechanical that they would have to do on the vehicle. took the vehicle in yesterday and the technician said that the veh is out of motor plan, explained to him that the reception lady told me that is fine they would repair it but he didn't do it again, told me that the radiator needs to be replaced and that would cost me 13k, told him that that's not my problem because I told him about the problem when the veh was in motor plan, I am seriously frustrated and want this to be sorted out as they are not delivering on their service as well as the suspension noise that keeps making that sound is still there. over all ill never take my veh back there again. bad bad bad!!!!