Resume To Fill — Regarding asking me to pay of 5900 as

As i registered for the company and they said they will pay 15000 Rs for to completing 600 resumes also I completed all 600 resumes in time. But now they showing not meeting the requirement and demanding to pay 5900 RS. But they are not providing where I did mistakes and how they did the accuracy check.

These guys are really frauding and now they are sending mail like need to pay 5900 or they will send the legal notice to my home address and also they mentioned they have my Aadhar card & Pan Card details with them so, they can deteriorate my CIBIL rating as well in course of non-submission of my penalty amount.

Please provide guidance and take actions like this type of company. Please do needful regarding this

Thank You