Indigo Airlines — claim for airline compensation

Here, i am complaining against indigo airlines (Booking id: nf[protected]) regarding my flight cancellation without any minimal cooperation at delhi airport on 14th october, 2017. Although we reached 45 minutes berfore of flight departure at the indigo boarding pass counter. But they told that just it has been closed the counter for that scheduled flight, we requested several times to allow us as that was during the diwali festival time. Instead of any kind of human cooperation, they misbehaved with us. Not only that we further requested to exchange our ticket for next flight but they did not return back our initial ticket price. They forced to purchase new ticket and that was delhi to bhubaneswar (Pnr:zjzb2u) instead of kolkata. Therefore we lost huge amount of money as well as unexpected kind of harassment because of those ground staff's of indigo airline. I am strongly demanding to refund back our money (10600 inr).