Not distributing the property

Hello sir.MY grand father had 2 daughters and 3 sons out of which 1 daughter and 2 sons expired my father is one among them.actually we are living in our grand father's home right now but we don't have any kind of financial support from my grandfather he is retired but he gets rents from home, he also had one property n sold that for younger son and he did not gave any thing for us and his 1 st son wife who is widow like my mom and even they are torturing us by words and blaming.... And even we have to put food for them by taking 1500 to 20000 rs a month....my grandfather and his younger son are just fighting with us and they are harassing my mom with words.....she can't bear and they are not even distributing the property and my grandfather is telling that we have to take the property when he expired. But it is really tough for us to live in this home..... how can we get our share in the property....and we have doubt that he gives the whole property to his younger son is it can be possible to do like that.....am 19 now wat can I do...