Bad serviceii

I took my car to Ecar thabazimbi to see what the problem was with the aircon. They inspected the airconand found that the condensor reciever drier was faulty. I was quoted a amount of R 4400 for the repairs.I didnt had the money but they still refilled the aircon with gas even knowing that it woundnt last. I was charged R550 for gas that would not last due to a problem.<br> 4 Weeks laterthe aircon gas was empty again. In the begining of the year I took the car back for them to requote me on the part that was faulty. I waited 2weeks and they couldnt gave me a quote.<br> I then took the car to Brunos in Rustenburg for a second opinion. They found the vauporater to be the fault but no spares in stock. Not the part quoted by Ecar.<br> I took the car back to Ecar they again tested the whole system and this time there was no fault they refilled again with gas charged me R850. The next morning the aircon didnt work. I took it back and they said that there are no leaks but a blocage in the system. I drove the again for 3 days then the aircon again didnt work. I took it back again after a week they comfirmed it was the vaupoater but couldnt repair it.<br> Why should I pay for installation of gas ???