C200 ENGINE PROBLEM

My husband bought me the C*** brand new in March at McCarthy Kunene Witbank. My car is only at 13000 km but I’m experiencing engine problems. The car is shaking like crazy. We called McCarthy Kunene Witbank at 7:30am so they come take the car the guy came at 10AM! I had to get to work but this guy took his time to arrive and gave us lousy excuses. Now Mercedes Benz is telling me some lousy story about waiting 48hrs to know if I’ll get a courtesy car. I NEED TO DRIVE TO WORK EVERYDAY. Why am I being inconvenienced because of your incompetence??? This car is BRAND NEW & HASNT EVEN BEEN TO SERVICE!!! PATHETIC SERVICE FROM MERCEDES BENZ, one would expect better from a luxury brand!!! WHAT A SHAME! I WOULDNT RECOMMEND, NOW IM EVEN CONSIDERING CHANGING CAR BRANDS BECAUSE THIS IS NONSENSE.