Moved out of state, can't get ahold of my court case information.

I got into a very minor car accident while I lived in Atlanta, GA. There was no damage; the other car barely scratched my bumper. We were going to move on and go about our day when a cop pulled over and asked me what happened. I was naïve and a little scared and told the officer I had made a right turn on a red light (it was actually yellow, turning red) and the other car hit mine from behind. She then gave me a failure to yield ticket. I had to go to court and asked for a trial. 6 months later I moved to California and since my case hadn't been processed yet, I was told to just call the Fulton County State Court once a month starting September 2013. I have been doing that since. However, nobody ever picks up the phone or returns my calls. The court currently has my address from Atlanta, and since I can't reach anyone to update my address, I am afraid that I will miss my court date and get into some serious trouble. What should I do?