Recovery of money

One of the business circle of my mother who is working in Tripura govt. had borrowed 2 lakhs from me for his loan purpose and told will return after 3-4 months on mutual understanding. Another 4 lakhs was given to him to buy plot for us as he told he knows someone who has good knowledge of the area nd negotiation in the West Bengal state. He was always showing his good behaivoural and fatherly figure talks nd care. And so started trusted him so much and his every word was so convincing and holy we felt. And that way he had total 6 lakhs money of ours with him. But now we came to know that he was cheating nd lying us. After giving money for some time thinking he is helping us for buying the plot, but he was not coz he was taking time and may be pretending. So we started to pressurize him to see the plot and purchase as soon as possible since our 6 lakhs money was with him and He may change his mind and become greedy. He works in the tripura govt.and visited our place for some business trip and that's how he met another person from our place and that person helped Initially in searching the land and negotiating the price in my mother presence. As he has to go to work in tripura, he assigned that person from our place to search the land and inform him once he find and accordingly he will give our money while buying so. To expedite the search that person and my mother went to search another land nd negotiated on 8 lakhs value . and then the person informed him about the land availability on 8 lakhs but when he told the land value he told us 15 lakhs instead of 8 lakhs. We did not let him know that my mother, that person nd me had already knew the land value is 8 lakhs. As we wanted to confirm whether he is really genuine or not. The person who helped searching land even told that before the present land he had even send another land picture of land value 9 lakhs. We dnt live in Indis at the moment as we are abroad. For this also he told 14 lakhs, than we came to know that he had been making plan of taking more money from us since the beginning. We knew his true colour and so we started asking him money on the pretext that my husband mother is sick and need financial support. While fixing the land value we thought he will give our 6 lakhs and from his side 3 lakhs he will help he agreed to give as an advance to the land owner but he instead asking additional 5 more lakhs making total of 14 lakhs. And remaining 1lakh after 3 months . Which means he wanted to give land money 8 lakhs, and 7 lakhs himself from our total money. Now we came to know lot more about him that he has family. Initially he told to my mother that his wife has left him, do not want to look after old aged parents. And has no kids. We are repeatedly trying to contact him but no response. Kindly tell us how we can file a petition to the court to get money back since we already have money transfer through bank and all the whatsApp chats, pictures of lands and land prices talk