faulty Car refusing to repay

I bought a car on the 23-10-2015. On the 23-10-2015 I called them informing them that the car is giving me problem and we agreed I will bring it on Tuesday the 27-10-2015. And they asked me to bring it back on the 2-11-2015 but I managed to take it back on the 3-11-2015 however on this case I wanted them to to refund me and the manager wants to give me 56 000 instead of 69 000. They want to repair the car. I just want my refund please help.