My family cheated my wife's and my money

My father has an acre with house in his name and my mother has half acre in her name. I completed education & got job in 2010 and was asked take care of them. Trusting my father, i kept sending him money till I left my job assuming my father will rationally spend and do the savings in my name. In total, i sent them 60+ lakhs (out of which there's only 55 lakh bank statement available). But unfortunately, my parents along with sister took all money in their account in form of money and gold jewellery. When I asked my father to give me my money back after marriage, he is saying it is all spent. He used that money. Also they took 5.5 lakhs from my wife saying that I don't take care of them. He now sold 20 cents of his hand that he promised to give me. Now they just threw me and my wife out of family and started creating scenes in society as I'm asking them to sell the house and repay my money. Also he is saying he will sell the site completely and give all call only to sister, otherwise I'll have to divorse my wife if I've to stay in his house. Please advise how can i get my money back. I kept sending money for 6 years thinking the site and at least half my saving will be passed on later to me. I have bank statments to prove that the money was sent by me and my wife as well. They are also blackmailing us that they will commit suicide if we ask my money back. And my sister is always harassing my wife for this reason. Please advise.