Damn mechanics

So....I'm not one to do my own auto work by any means. I don't have the time so typically I'll take my car in for any sort of work it needs. Today I get to the reception desks to drop my car off after I had charged it all night in hopes I could drive it the 2 whole miles it needed to go to have someone replace my alternator. Most people realize that an alternator takes maybe an hour to to do if you are taking your time. They tell me that my car will be done by noon. Since I got an appointment for when they opened you would just assume that call would come around 10-11 that it was done. So i call at 3 and they say that they won't even get it done TODAY. Last time I ever take my car to this place.