Tire Kingdom

On Tuesday 09/03/2019 I went to make the change of oil to my car. When I got into my car after they made the oil change I felt a very strange smell, I thought that oil had fallen into the engine and that was why it was the smell. I left and I drove around 5 minutes to get home. At about 10pm I got in my car I was surprised that the a / c did not cool, the smell was still in the car and it sounded very strange. The next morning I took the car to Tire Kingdom to give me an explanation of why the a / c did not cool if everything was working perfectly when I gave it to them. After waiting 20 minutes a technician came out telling me that my car was 6 years old and that was why it was failing, I told him that my car had been fine that in May he had an inspection by the dealer and the a / c was in perfect condition. The technician very rudely replied I did not ask you that. I told him that they did something to my a/c and I didn't give it to them like that and the technician told me if you want us to fix it it costs $200 and I told him that I didn't plan to pay him anything, my a/c was cooling. They had an hour and a half looking for a leak that supposedly my car has at the end they told me that this is what my car has. I told him my car has been working very well since they had it, the cooler no longer works and it shakes while driving. I asked them to see the cameras to see what they did to my car and they refused. Somehow if they didn't do anything to my car why they agreed to check it for more than an hour? If I as a company do not feel any responsibility as well as they say I do not touch anything. I feel it is not fair what they did something and they wanted to charge me $ 200. I need this resolved, what is happening is not fair.