Anonymous on "Money Cheated by group of cheats, What should i do"

I was cheated by a group of people near JVLR, Hiranandani stop, Powai, Mumbai.
2 Person invited me to see whats happening. one person bid for 40k on my behalf.
These group of cheats, acted faul that i have won 40k and to get that i need to bring the same amount of cash.
After bringing 40k cash, they pulled my hand with money to put on a card, he showed the card is blank and told you loose 40k.
To recover 40k they asked to bring another 40k and cheated another 40k in same way.
One person told that they work in Hiranandani hospital, Powai, Mumbai.
Total 80k is cheated by these people.Later 2 people from group asked me leave saying you have lost money, dont loose prestige. Later when i reached the venue to record and complain, none were there.
What should i do.?