Faulty new TCross

Less than a month ago I bought a new T cross sliver. I then take it back a hardly a week after buying it because the wipers was making a very bad sound when I wipe the windscreen when it rain. They try to fix it and reset it. Then it rain again and the noise was there again. I then went on holiday for the Long week on the 13 Dec and I started to hear a knock on the front passenger side's door as if something is lose in the car. Short distance you don't hear anything but once you driver the long distance to noise start and it get harder. I then contact the person that sold the car to me and he ask me to bring the car in on Friday after 09:00. Than the nightmare started I took the car and waited 2 hour if not more for assistance, after waiting for the 2 hours no could even explain to me what is going to happen. I then insist to get help and they have verbally telling me that I need to bring the car back on the 7 Jan and that they will send me and sms. It is Monday morning 10:10 and still no sms what so ever. I now need to go on holiday with a car that is giving me problems and no one from VW Alberton worry or care. This is my second car I bought from VW and this is the first time I experience this bad service.