Indigo Airlines — Rude staff made us miss the flight

I booked a flight from. Mumbai to amritsar
From indigo airlines
On 10th july 2017
The flight was to depart at 10 35 am in the morning
As per the policy we were to reach 45 minutes before the departure
We were 50 mins before but we were not allowed to board the flight
We were misguided by the staff and thus when we reached the counter they started arguing with. Us that you are late hence you cannot board the flight
The staff was rude and they harrased us we left with no other option had to book another flight with vistaras
Thus we request a refund
Our flight tickets worth rs 6000 (Approx)
Got wasted
And we had to book another tickets for rs 14000