Frontech — fraud and mental torcher

I was finding job from home then got a call from an executive of frontech company named rahul desai number [protected] ) to fill 1500 within 10 days then i started completed the work from very next day and submitted on its submission date and i checked my work twice it was totally accurate but after 2 days they send me that my qc report is fail and now their advocate is calling & mailing me to pay Rs. 4500 and threatening to file a case against me . Please help me i can't pay any money in fact i can't afford to pay.
Thier email ids :
[protected]@gmail.com
[protected]@gmail.com
Please help .