Centurion Motor Engineering horrible service

<p>I took my car in to Centurion Motor Engineering for a major service in Dec Jan 2016, my speedometer and petrol gauge worked fine when I took the car in, when I collected the car from them the speedometer and petrol gauge no longer worked properly, I told them I would bring the car back in Jan as they were closing, after bringing the car back they now say it is wear and tear on the car and want to charge me R1500 on top of the R18000 I already paid, I feel this is extremely unfair as everything was working fine when I brought the car to them, they refuse to help me and I have no money left to spend on the car, also when they did the service they did not even test the car, because if they did they would've noticed the speedometer is not working or the fuel gauge, I can't believe I have to pay for there mistake </p>