I don't think they are proper mechanics

I tried Car Service City a few times now. But I have decided to go back to my old mechanic again for the simple reason that I do not think the mechanics at Car Service City know what they are doing. How can you fix one thing and then within a day somthing else in my car breaks? And it only happens when I take my car to Car Service City. And I love it when I take your car in for a major service and they phone me to inform me that there are lots of stuff wrong with my car and it will cost 15-20K to fix it.