So here it is: Is there any lawyer that has dealt with a 28 year old Child support case that the child was adopted?

Background: Child was adopted at 6 years old to grandparents. Parental rights where terminated and states they could not locate me. State of VA continued to collect child support and send to mother after adoption until she was 18. I have adoption paperwork and Birth Certificate and I can not believe this is right nor legal. I tried to go see her and was turned away several times. Now I understand why.