Prox — about half information

Address:	Agra, Uttar Pradesh, 282004
Website:	ffwork.in

A girl named as Rinky Bajaj called me and said for the form filling job. I said yes and sign an agreement with them. Like this, they send me a demo but they didn't tell me about how to submit work. I've complete my all 900 forms and wait for the last date.
My complaint is ;
-They didn't attend my phone calls especially that girl named as Rinky Bajaj who was said that she will help me on every point of glitch.
-The helpline no. is mention is not responded.
-When I ask from helpline email, they reply me after the last date and ask for money for 7800.
I was clearly said no, then they start a threaten to make legal action against me. Please help me to resolve this issue.