Poor service

I have been having problems with my car( BMW 1 series 116i 2013 model) for the past 5 months. I keep getting the drive train warning, In the past 5 months I have taken my car to the dealership 5times. The problem will b solved then 2-4weeks later I will get the warning again which means a subsequent visit to the dealership. When I ask the dealership( AutoAlpina Boksburg) & BMW South Africa what the problem is, I get told anything in the engine get trigger the warning.. As we speak I have lodged a complaint with BMW South Africa regarding this matter, my car has less that 65000KM on it but its already acting up. I have actually become despondent and am realising that I may not get assistance even from BMW SA. Please think twice before purchasing a BMW because once you drive out of the dealership you are on your own..