Share of legal heirs in property if parents died intestate

Brothers produced affidavit,indemnity and wittness to close my deceased mother bank aacounts stating that they are the only legal hiers. While we two sisters are also the legal hiers of my late father and late mother. We dont have will of my mother while my father wrote a will ,according to that after his death mother was the only legal hier of his properties. This matter is almost two n half years old.