Car even more faulty after repairs

Took my car to get the rattling sorted. Instead it has gone worse and the engine light is now on. Was under the impression that the car needs to be checked before repairs are carried out as that is why its taken to a professional like themselves. They could have called and indicated it was not the stabilizers. I was told by my mechanic in Durban the stabilizers that were replaced could still go another few years. More annoying is that the engine light is on since getting car back from them and they take no accountability for that. Now they've given me a quote of 3800 to fix the noise again after paying them 2200 to initially sort this out. *******. Be careful. Dont ake your car to them. The car they gave us a lift back home had the same noise. So if they can't fix their own cars it's unlikely they know what they doing. Just out to **** you.