Profit share from promoter, share between legal heirs

We have given our own house for promoting. We have left our house to promoter on Nov 2015. In the agreement it is supposed to be completed within 2 years. Now it is somewhat 70% completed and approximate date of completion is another 4 -5 month. We will get 50% far. Another separate agreement is there to share profit of 33%. As consideration for promoting, he was supposed to give 4 lakh which he had given. He has given another 1 lakh which is to be adjusted with profit share. We are four legal heirs mother, two brothers and one sister married. Now as he is delaying to complete, we are in need of money. My elder brother has taken Rs.5 lakh but I have been given only 50000, the promoter is reluctant to give some money from my share of profit as I need it for my business purpose. Approx share of profit 36 lakh. Also we need money for day to day family expenses as we two brothers are infirm and no source income there which would have been if we not given it for promoting, we had given one floor at rent. Can I approach to court for demanding money at present ? He has given Rs 5 lakh to my elder brother but he is reluctant to give me now for anything, can I demand it now as in the agreement it not written anywhere that profit shhare will be given after making profit and he also provided one legal heir and Rs. 1 lakh for family expenses. Can I alone , one legal heir approach to court demanding bond to honour the agreement as I suspect fraud on the part of my elder brother and promoter. Is my elder sister married eligible for equal share, is promoter liable to divide shares in right proportions among the legal heirs. At the time agreement we all have signed. As per standard practice of works contract, when the building is 70 to 80% completed, there will be a cost estimation and profit estimation . Kindly give proper advice asap.