Monsterindia.com — Fraud calls asking for money to get a job

I got a call from monsterindia.com saying that I was shortlisted for junior resident job in Apollo hospitals, chennai. He asked me to pay Rs.2850 for reference code and later on they organised an interview. The following day, I got back the call saying that I have been confirmed for the job and that I have to pay Rs.9900 for verification of documents. The following day, they provided me with an offer letter stating I have to pay Rs.22500 for agreement. I started to have doubt regarding this and called up Apollo hospital. Then I realised that this is a fake interview and job offer. I have paid Rs.12750 in total and I demand a refund and explanation for such fraudulent activity.