EMS — job fraud

Well on 18th march i recieved a call from ems enterprises saying that they contacted me through quikr and asked if i wanted a job so die to that i agreed and after accepting they made an online contract stating if i dont do their work within 10 days they will fine me 5100 ruppes and after all this i tried to contact them but they are not responding and their website is also not working so it bothers me that they will blavkmail ne and will ask for money so please help me