Property card name change, manipulation

Upon my mother's death, My father and my brother got my signature on no_ objection document for transferring the property card to their name. This was done in manipulated way by not informing me the true facts of the document content, was done during the mourning period and I did not understand these matters well then. Now I learn the Property card is still on my Mother's name who died in 2009 and now my father wants me to sign an affidavit doc, for name change as it seems the property card now has to first transfer from my mothers name to all the legal hears. Seems they arent thru and are stuck now, Looks like I can battle back and get my right What can I do now to claim my share/equal right ? what can I do about the trick-document they have got my signatures on earlier. ? I want to fight for my/women right, I have equal share in the property which is on my mother's name. Please guide me, it is 2019 and yet some people think married women has no right after marriage on Mother's property/asset, they need a good lesson to be taught. Hence Kindly support with genuine advice, Write to [deleted] , upon which we can get in conversation as applicable Thanks -