My father's property sold to my brother

My father sold his property to my brother without informing me. When village president asked my father about this situation. My father said he went into debts for treatment of my mother's cancer. So he wanted to sell his property to someone. But my convinced him and bought all his property. Some important points:- 1- My father and mother stays with my brother and my mother served my brother till her last breath. 2- So Why should my father will go to debts? My brother has responsibility for her treatment my brother should pay the expense. 3-No one mentioned about the debts at the time of my mother's funeral. 4- It's been 10 years she has passed. The land registration done recently. With out informing me about the debts and land registration. 5-We have a shared pathway to my brother's house. Which belongs to me. 6-Can I block pathway to my brother house. As now after my father's land registration he have land connection from main road to his house. 7-my brother also done health insurances to my mother. But he is not disclosing the claimed amount. He is saying ₹70000 was claimed. But family friends are saying that he has received claim more than ₹1500000. How can I know the claim amount?