Faulty Engine

I bought new GLA220D. it was not starting the 2nd morning, Based on my complaint they took my vehicle and delivered it back after 3 days saying problem got rectified. Again after 8 days same problem of not starting. Again they tool the vehicle and from last 2 weeks vehicle is in work shop and understand that some problem in Engine control board and it has to come from Germany and it may take a couple of weeks. It is ridiculous that, new vehicle is giving the problem from second day onwards. Mercedes has delivered the faulty vehicle to me and cheated.