Case of fraud travel company

This is a case of fraud. I had booked a trip which was referred by my friend looking at a post on a website of group travel. This add was posted by a travel group master on that site and who was mediator between travel company and us (3 girls who booked together). But within few days of booking and paying half amount we got a doubt on the agency and we did some investigation on our own and got to know that this is not a trustworthy company. So, we decided to cancel the trip to avoid more problems. As per the written commitments and receipts if we cancel trip before 60 days, company will refund 100% amount to us. Now, neither the company is refunding that amount nor the person who has taken responsibility and posted an group travel on website. I live in Pune, Maharashtra, person posted ad lives in Mumbai, Maharashtra and agency is in Pondicherry & Chennai of Tamilnadu state. I have all the records of communication and payments to the travel company. I also have the receipt of payment from the travel company. What should I do to recover my money?