UNHAPPY ABOUT POOR SERVICE I RECEIVED

In June of 2011 i purchased a brand new Chevrolet Corsa utility at Reeds Delta in Bellville. With every service i made them aware of a grinding noise im experiencing when i attempt to shift into reverse gear, as well as a the shiftting difficulty i experienced when shifting from 1st gear to 2nd gear. I was assured by them that the problems were attended to but clearly they were only doing a quick fix instead of diagnosing and solving the gearbox problem. In 2014 at one of my service intervals i was told by Mr David Blaauws that my warranty had expired and that i would have to pay in future for whatever i wanted fixed on the gearbox. My question to him was why didnt they replace my gearbox with a new one seeing that it was a new vehicle i bought and it was under warranty at the time. HIs responce to me was( with a hint of ****yness in his voice) that it was not that easy to just replace a new part and that it was out of his hands. It felt as if i was nothing more to them than just another sucker being beat around the bush. They wer quick to recognise me while my wallet was open to buy and service watever i needed for my vehicle. My bakkie is not driving because of the same problem..