Indigo Airlines — Not confirming me in next flight and took rs 5154

Address:	Gurgaon, Haryana
Website:	www.goindigoGo.in

I have booked ticket in 6e299 from Delhi to Kolkata and had pnr no FBY3ND. I reached airport and after checking in I went to punjabi court and had dinner. At 2100 I was near gate no 16. So I was waiting for flight boarding call. I haven't listened any boarding call at airport. When I went in front of gate at 2130 they said door are closed. You will be boarded in next flight with compliance charge. So I went out with indigo staff. But when I reached in airline counter. They refused to board me in next flight. They also charged Rs5154 for morning 0610 flight from me. How can I refund my money.