NEFT transfer

A firm having current AC from West Bengal i contacted me on cell phone and said it id website designing and asked to send Rs.15000/-. I don't have address of firm, but only cell phone and Watts app no, and sent Rs.15000/- from my current AC. Then they asked to Rs.60000/- for 5 yrs to make the site online .Since I had paid Rs.15000/- , I was confused and also paid Rs.60000/- hoping to see my site online. But they did not provide any website not anything.Now when I asked to refund my money they say, pay 60000/- and they will refund Rs.120000/- after payment of 60000/-. They are cheaters,now how do we deal with them.pl inform, how to get money back