Quickjobzz — Mail about legal action against me

I have applied for a job in quickr jobs.Next day I got a whatsapp message from [protected] named vision technology. They asked me whether I was interested to work from home and there was no registration fee.So I said yes.Then they asked me for details such as id card, mail id, photo and signature. I provided all those and completed registration. They send me the work and told the process .They also provided me an agreement paper with my full details. Now I have received a mail to pay the penalty of 8000 RS or else they will take legal action against me.Can u pls help me.