Mahindra Boksburg misrepresentation

I bought a vehicle at Mahindra Boksburg across from Rast Rand Mall couple of years ago. When I bought the vehicle, the mileage was low so I asked the salesman what is the reason. He answered it was a rep car and they trade it in every year or so. To my greatest surprise when I had a minor bumper bashing 1½ years ago I was told that my vehicle was in a major accident and on confronting Mahindra Boksburg their answer was. It's too late to complain now. Obviously I would not have known if I never had an accident. Also, on purchasing the vehicle I told them I do not want a balloon payment however to my greatest surprise I found out during the recent week that I have a balloon payment, owing another year after querying why my car is not paid up yet. Another issue of misrepresentation is that I was told it's a 2015 model only to find out it's a 2014 model. Just a word of advice, really do your homework when buying a vehicle from this branch. My daughter bought a car from them as well and found the vehicle not yo be what they said. She sold it a year later and swore never to go back to them.