My question involves paternity law for the State of: VA

My child's father established paternity shortly after birth by signing an Acknowledge of Paternity and swearing in court that he is the father of our child shortly after birth.

He was active in our child's life for 10 years until he married (our child was the ring bearer in his wedding). Then he requested DNA testing, which found him not to be the father. Consequently, he had his parentage and child support was terminated.

This has had devastating effects on the life of my child, and myself. Is there any recourse in this matter?

After research, I found that an AOP is supposed to be legally binding and not over turned. I also found that my child was supposed to have a guardian et litem, which wasn't appointed for the court proceedings.

What can I do now?