Indigo Airlines — 'didn't let me board the flight'

Address: Mumbai City, Maharashtra

I was to fly on 01.06.2015. My flight timing was 4:45 P.M. for Bhubaneswar from Mumbai. On the same day I did web check in. Indigo airlines claims to be a hassle free trip through web check in, but it made me missed my flight. I reached counter at 3:55 P.M. and informed the staff about my flight. Instead of assisting me, he told me to go the last counter. And when I reached at the last counter the staff didn't let me board the flight. He was so rude. Kindly teach some etiquettes to your staff. Please refund my money. My PNR No. is M66M9P.