Cheated by a girl online

I was duped by a girl who said she is from Britain. She asked me for help to show around places in Chennai when she travels here. I agreed . She told that she is very rich and she will pay even my expenses if I stay with her in 5 star hotel. I had once seen her face through video call but don't remember it. On July 29 she whatsapped me the ticket of her from London to Delhi and she sent a photograph of her in flight. On July 30 morning some friend of her I suppose called and said she is from customs and Eliza had not done the yellow color fever vaccination and she needs to do it or she will be sent back to UK. She even handed the phone to the girl. She also said arrange the money and she will return when she comes to Chennai. I was not convinced but I paid her anyway through an account her friend acting as a customs employee messaged me. Then they said that Eliza has done her vaccination but when they scanned her baggage she had lots of cash and govt seized it and she will be sent back to UK. Later Eliza called me and asked 60 k INR but I didn't pay this time as I was thinking something is wrong. Now her friend has her mobile switched off . I have lost 30K to this I need some relief. Please help.