Nexgen Services — nexgen services - fraudulent activities

I have been cheated by nexgen services of 485 altis, 4 th floor, opp. Vadodara central mall, near genda circle,
Vikram sarabhai road, vadodara, gujarat - 390023.

They offered me a form filling job, where i had to fill 650 forms within 7 days. However, due to some server issue, i was logged out, when i logged in, they blocked my id, to get it invoked again they asked me to pay rs. 8000 which was supposed to be refundable, i paid the amount, and server got down again the next day. This time i called them to look into the issue, they told me to follow some steps in the browser, which i did, in spite of that they blocked my id and asked me to pay rs. 8000 again.
I told them i don’t want to do this fraudulent job, for which they asked me to pay rs. 5000 more.

Now they keep calling and threatening me to pay the remaining amount, else they will lodge the fir. Please help me, i’m a student and can’t pay any such irrelevant amount.
I want to get my money back, can this company be stopped from doing such illegal activities to others?