What I did was even go so far as to get in touch with a family here in town, a Mexican family in which the father needed proof for his birth in order to obtain his Social Security benefits, and Mexico said they did not have any.
One of the last e-mails I sent to Mexico said that if I would "bring an attorney with me they would see what they could do, for a fee." With that I said what is the use? I need my information for DAR purposes, but all I can say is guess we keep trying. I wish I could be more of a help, but that is the type of answers I have been obaining in my brick walls.