Did you actually get served an order to appear? If so, you must appear and answer questions under oath to the best of your ability and truthfully. If you do not appear the Judge can issue a warrant for your arrest. That being said you have the right to have your attorney present to protect your rights and assist you in limiting the scope of the questions. Most importantly don't lie tell the truth what ever it is. If you have no assets there is nothing to collect against and some assets are...
I practice in Florida not Georgia. but I believe you can petition the court on your own "pro se" or go to Local legal aid for assistance in petitioning the court for modification of the orders to correct the errors. Doing nothing will not get you any relief. Have you appealed to your ex to voluntarily comply? Miricals can happen.
Chances are slim to none. If a bankruptcy was filed you can make a claim in the bankruptcy proceedings. However it appears that you did business with a corporation and your claim would be against corporate assets if any. Usually there are no assets to collect against. Outside chance of a fraud action in the bankruptcy or with the states attorney. Unless there is a great deal of money at stake or your are very rich the actions to recover have no commercial value as you will spend more money...