You need to consult with an attorney immediately. If you are not the biological or legal father of a child, then you should not be paying child support for that child. Dealing with the Department of Family and Children's Services (DFCS) can be a very complicated and difficult matter. Attorneys that have experience in dealing with DFCS can help you navigate your way through the dead ends, and get you the progress and solution that you seek. Many attorneys offer free consultations, and you should bring all of your paperwork to the consult in order to find out what the best options for you are in resolving this unfortunate situation. Feel free to check out my profile and learn more about myself and my law firm, and I would be happy to set you up with an initial consultation to discuss your needs with one of the attorneys at my firm.