Secretary not Transferring the share certificate

Society is not Transferring the share certificate in my mother's name, This is my father's property. My father had nominated me, after my father's death I have given no objection to transfer the property in my mother's name.we have submitted the required documents like affidavit and indemnity bond along with copy of death certificate as well as the membership form & nomination form 2 months ago now the secretary is saying it will take 3 more months to decide in AGM please guide me what should we do?