Money recovery

Hi sir. In 2015-16 I gave money to a person whom I knew. It was an investment in his new venture about some recreational activity. I live quite far from his place so could not meet him often due to my personal works. I transferred about INR 1L. I had done it as he showed some good intentions behind the project where it was helping some needy people. But he sent a stamp paper with all details and rate of return etc. But he mailed me original hardcopy without signing it that too after I called him multiple times. I did not send it through mail as I was not sure if he will return back the paper as hia behaviour changed after money was sent. So I wanted to get it signed personally. But it didn't happen as he was traveling and I could not go to his location. Till now it's not signed. In paper he had written that in the event of urgency, money will be returned back after 6 months from written request. During all the time I have sent him mails about investment and also have numerous whatsapp chats. In 2016 end I had some medical emergency at home. So I wanted money. So I sent mail to him and also Whatsapp message. I expected him to give all money atleast after 6 months. But then he kept on giving excuses like demonetization, health and delayed. After a year of continuous follow up he sent 5000 once. I kept on asking as I needed money for various work. But he gave silly reasons which made me beleive that the person who seemed genuine was fake. In three years he returned 2000, 5000 etc and till now did total 49k. Sometime after asking for 6 month, he sent 1000. I needed money during my sister's marriage, may marriage but nothing seemed to make him aware of my situation. While all along he was traveling on his some mission !!. Everytime I ask, he want my bank detail, want me to install new app for money transfer and all nonsense. So off late I'm thinking if this case can be taken up legally though I have stamp paper only signed by me. Paper is taken in his name and my name. I have all mail and whatsapp communication of all these years. Please suggest what I can do. He stays in Bangalore and is known well in society