My first time there and I had a mediocre customer ...

My first time there and I had a mediocre customer service in the car service area, took my car to charge my air conditioner and the first thing I was told was that this may not work!!! I stayed nothing is wrong with my air conditioning it was functioning fine, it just needs to be filled and the specialty reply was I m just letting you know do you still want to do it!!!...I guess I will take the chance to pay you for nothing if you re not giving me any alternatives or what I should do...They told me I can wait for the service and 3+ hrs later they can t even locate the person in charge of my car service and after calling several times to check on the status of my car, I am still waiting, have no car and has not been able to get a call back