Pexiv — pixiv - fraud company harassing and threatening for money

I took a job online from pexiv company to fill 900 forms in 9 days. I firstly completed 900 forms than i called the helpline because the forms were not being submitted than they told me delete the history of browser than i submitted it than a pdf file was opened which had a password and after one day they given me password for that file than they given me a fake qc report that your forms were not accurate than i cross checked half of them was accurate and on purpose they manipulated the forms to harrass me and later threaten to sue me. The asked me to 4700 INR and Today they are asking me to pay 7700 INR. Later I researched on the web and found out that I am not the only one that they scammed but thousands other people were also scammed by this company. I humbly request you to take a strict action against this fraud company. They should forced to pay the money to the people that they promised they would if we fill 900 forms.