My father and my mother divorced before I was borm claiming I am illegitimate

Ma'am my mother and her first husband separated before I was born in 1994, the reason for their separation was the claim from her husband's side that I was an illegitimate child. After which I was born and raised by my grandparents for sometime. In the mean time, around 1996, while my mother was working in Delhi, she met a man, they started living together or I guess they got married too. Now the thing is all my legal documents have my stepfather's name in place of Father's name. Right now I want to now that, if through DNA or anything, it is proved beyond doubt that I am indeed my mother's first husband's child, will it be possible to have a share or whatever it is called or kind of child support from him although right now I am 29 years old but if he Indeed is my father then shouldn't I be eligible to get whatever child support I was supposed to get for all these years and I am not yet married. And it was very kind of my stepfather to adopt me as his own child because they don't have any other children, so I am a single child. So if you could enlighten me as to what could be done in this situation.I don't know anything about my mother's first husband,I only know his name, apart from that I have no information about him. Even the divorce between my mother and her first husband was completed in about 2007or 2008 and thing is none of them appeared in the court or anything, it was simply done via some relative from my mother's side who is an advocate.