We regret booking the car at Kia Randburg

I took my husbands car at KIA Randburg last month,The car its almost 2years..They called to tell me that the brake pads are almost finished and needed to be fixed.We told them not that day cause we dont have a budget but will surely sort it out..Later i fetched the car with just a minute drive i heard some griping noise when i brake.i took the next turn and went back there.they told me to drive around with one of their guys but the noice had stopped the noise came again in 2-3days.We then bought the brakes from a franchise an took it to one of the Kia employees who is a friend and he assured that the braked where ok and fitted them.The noise gain,he called KIa and they booked him in they checked everything and said the car was fine it wont make noise again. Few days again the noise came,we called then again and booked the car.Immediately when i got there because they knew i didnt fit the brake pads with them they checked the brake pads and said its not theirs and then the guy who tested the car aslo assured that these nothing wrong with the brake pads,we drove around twice until he heard the noise and said he knows whats wrong wit is.Now they say we damaged brake disc with new once