extraordinarily worst after after Sale Service

I bought a White 2014 Chevrolet Spark at the Montague Gardens Branch in April of this year 2015. My first complaint is that I NEVER received my spare key till this day and I have been calling the head offices even went to the branch in person and the salesman assisted me promised me till after some time I heard he is no longer employed by the company. My second complaint is that my car has a rust since the month of May and I did take it to the branch and they had my car for 2 days and came back not fixed instead there they just put mats that were also not in the car when I took it out from the floor. The last point is that when I was installing lock nuts on the wheels of the car I found another problem which the stud turns with the nut when I try to take out the nut. I can imagine if I had a puncture on the wheel whilst traveling with my wife and 7 month daughter and I have travelled twice to Port Elizabeth, I wouldn't be able to remove the wheel to put a spare. I went to the branch to report this and they said they won't fix it but I should do it myself. I mean, why I should be paying for things that were never caused by me. I have treated the car well as they can inspect it and r