Vw sold me a top range brand new car with problems and they refusing to take responsibility a very dispointed client

So I bought a brand new T-cross from this dealership in booysen, I'm thinking it's a dream no problems just put on petrol off I go, but it was a begging of a nightmare and problems, my so called brand new car now has 1 year 6months, but it's hell, second day after I collected the car it switched off I asked the sales person should I be worried he said no it's nothing, by the way its the top range of the T-cross, tsi highline R-line DSG, I was told it come with all the extras offered in it, to my surprise some of these things don't work and apparently it doesn't have, is this not *****? As the story goes the car had less than 6months went to nelspruit horror it switched off in between a boom gate after paying tallgate, that was only the start when I'll be stuck in traffic for more than an hour it would stop and have to restart the car again, mind you it's a DSG automatic car it's not suppose to, now problems increased I reported it last year when it was less than 6months they said they couldn't find anything, the manager even wanted to take my car without giving me another car to drive, I took my car problem not solved, more problems the car switch off when I stop and have driven a distance of more than 20 km, it over heats, the dim bright light for the other person don't work, senses just go off without valid reasons, speaker of the car sounds like radio lost station when on a call, drops temperature, the mist button to clear the mist takes more than 10 minutes to do so, the so called automatic lights don't turn themselves on, my seat shows that I must put on a seat belt even when there's no one seating on the seat, the car rolls back after you want to drive after stopping mind you it's supposed to move forward since it's automatic, the electronic widow's buttons from the front seats germs, brand new car top range mind you, how does a new car not have matainance plan, oh the sales person Saud my car it's covered for service plan for 3 years or 60 000 case, now they talking a different plan they say 45 000 case, it's a **** vw how can a car which is 1 year 6months have so many problems, they not even willing to assist the dealer says I must monitor the car cz they can't find anything wrong with it, how is that my job and I'm in the office most times not driving but these are the things gapping within the little time I drive it, I called and lodge a complaint with vw south Africa they Said they will invistigate and 48 turning around time I have not heard from them, is this what the brand represents because I bought a problem I informed the sales person a day after receiving the car, now they made sale they don't care after I'm paying a lot of money vw has failed me as a customer and still doing so, all they doing its dragging time so I'll be out of warranty and pay from my pocket, where is the quality and customer service and delivery of what you sold me, I'm so disappointed and frustrated, a so called brand new problematic car I'm very disappointed with vw as a whole.