processing of removing the unknown

I have a case that the is a child that appears under my deceased my who is married and have children, I went to home affairs for the child to be removed from march 2026, and when i went to to home affairs to check if the child that we don't know has be removed under my mother, not not he still appears and that thing is blocking me and my sister from processing our deceased mother and father's estates. they told me to check every two months and the process was done on march, so how long do we have to wait for them to remove the person and for us to process our parents estate. Please help me with the situation because I don't know anymore where to go.