Indigo Airlines — denied entry even after waiting in queue with boarding cards

We were travelling from Hyderabad to Chennai Indigo - 6E872 on 31.12.2017 -22.50 -00.05 flight. We had shown the PNR Details in Mobile, was denied entry and was asked to bring the printout. I checked with the Indigo front office who gave the printout and was permitted. In this world of digitalization, im amused why the mobile sms is not allowed. It is the responsibility of Indigo management to inform the passengers that printout is needed for entry, which was not mentioned anywhere in the mails received by us.There was no signboards on Indigo check-in, had to ask people and went and stand in the queue. I was with my wife and two kids (9 year and 1 year old). I had seen the person in front of me check-in for Chennai. When our turn came, the person told the check-in gates are closed and cannot be checked-in. There was no announcement, no displays. It was as if the gates were closed at the mercy of the front office staff. When we enquired, they behaved so rudely and said we have the go in the next flight with paying 14000/-. There was almost around 45 minutes for the flight to depart. When we told that we have a kid and it is difficult to spend 6 hours in airport and had to excuse on humanitarian grounds, they refused and charged extra Rs.5000/-for me and my wife and waived off for my kid. The higher officer told that it is unfortunate that we had missed the flight, which was not the case. There was atleast 45 minutes for the flight to depart. When we went to the front office, the lady was shouting at us and wantedly delayed giving us tickets. They gave the ticket around 22.35 for the new flight even before my original flight departed.
I had pleasant experience in Indigo earlier, and i always prefer indigo flights especially domestic. This experience has made me think twice before i go in any Indigo flights in FUTURE. Indeed i will not travel in Indigo only for my front office experience. This experience has created an impression that Indigo is not having any human value consideration and planning to get extra money based on the situation.

I dont know if the management will look into this, if yes, it is important that the front office staffs behaves well with the customers to retain your customers.
Date of Travel Time Passenger Name Destination
31.12.2017 22.50 Sundar, Sripriya, Chandini, Sahasra Chennai

Sir my name is Rajendhiran sadhasivem Dec 23 night travel to indigo flight Dubai to Chennai dec 24 morning for morning to my home reach my travel bag opened to 10.am my shocked all things open my things chocolate, biscuits, badam, bishtha, all things cover is open so pls you action immediately sir