Metrosis Enterprise — online fraud

I revived a call last friday from metrosis enterprise for online data entry job they signed a legal document from me for registration for work but now i don't want to work with them and they are forcing me to pay rs.4999 they said they will case on me if i didn't pay money to them i am not interested to work with them but now they forcing me to do that with out my permission plzz help me to find the solution about this problem otherwise i have to pay rs.4999 to them and i am student so i don't have any money to pay them