Resume To Fill — Fake job with demanding portal charges

I thought of doing part time job so searched in Quikr and got this job notice... So without knowing it's a fake I started the work and later I got to know that it's a fake so I stopped working and blocked their contacts... Now they are sending some warning mails to pay the portal charges and also they are black mailing like they will do problem of my cibil and my bank accounts.. so please help me out from this