Property division among siblings

Hi My father passed away last Fe-25-18. He didn't make any will but he always told children that his property need to be shared equally. Land was bought by my father and he had constructed house and lived in that house for more than 20 yrs. Latter my brother demolished old and took loan on the land and constructed new 3 floors as rental property. There was a time my brother didn't pay loan amount and monthly payments so house came to auction from bank. At that time me and my sister paid of all the loans and saved the house from auction. Now my brother is not ready to give our share, and our mother is not in a state of deciding. He keeps telling he put so much money in construction and he did pay some loan amounts but he couldn't pay the accumulation of interest amount. My father over ruled all the loss and decided that it was his own property earned and he verbally made 3 of us sit together and said what is his final wish. He even made me write all these and before he signed he was hospitalized. When he asked me to take signature on those paper in the hospital my brother said this is not the time and he didn't let me do it. Me and my sisiter took care of all the hospital expenses of my father. His burial expenses. Every time my brother don't share any expenses but he wants property full. What should me and my sister do?