Bought a damaged new car

I bought a Ford Fiesta ST from Ford Cape Town in October (sales Caren her manager Carlo). On delivery i noticed the car was dirty and had a stone chip,witch i pointed out. They told it will be attended when i get back. i took the car back thrice and the problem was not addressed, they made it worse. They asked me to go the panel shop to get quote. At the panel I asked if it is normal for the doors to close with difficulty, they told me the doors are not aligned. Since December the car has gone in for repairs 3 more times, coming back with half jobs done or more damage. Since February i have been dealing with Sibongile as i am fed up with Ford Cape Town and wish not to deal with them, she has been dragging the matter. When i got the car back from Ford Cape Town, i wasn't happy with the work done. I mailed Sibongile and she didn't reply, i called her and she claim she didn't see the mail. She mailed me Thursday and responded, Yesterday she called me to ask why haven't i respond to her mail, told i have. Her reply was \Oh, here is it\". She said she will mail the dealer and wait on their response. I feel this has been dragged out so that i will just get fed up and just for get about it"