My second and last time there. Car was supposed to...

My second and last time there. Car was supposed to be serviced for 3-4 hr it was there for over 5. My car is not even 2 years old and the AC broke, AC is under warranty but because it was not manufacture defect I ended up paying for them to even check it. I also have extended warranty and was told my car is covered for everything, apparently not. Last time I was there there I was told 2 of my tires will have to be replaced as they were in the yellow for thread, this time they magically made it back to green and look fine. Inconsistent.