2009 Chevrolet HHR warning lights

I own a 2009 Chevrolet HHR. Sometime three light turn on indicating that ESC, Brakes, and Tracking needs to be serviced. I have spent several hundred dollars trying to get this problem solved to no avail. Do you have any suggestions?

What did the mechanics DO for this money? How many miles on it? When did this start? Under what conditions does the 3 lights appear? Do they go off by themselves?