Indigo Airlines — Unacceptable late fee charged at Indigo check in counter

Address: Gurgaon, Haryana, 122015

I would like to know the reason why Rs 200 was charged at the Indigo check-in counter : terming it as late fee .

The flight details are as follows :

Flight No - 6E 493
Departure Time from Delhi : 15:50
PNR Number : RH5TVX
Incident time : ~14:50
Date of journey : 18 Feb, 2017

My mother (passenger ) was inside the Delhi airport at 14:30 itself and there was a long queue inside the airport (E counter). Not much effort was made by the Indigo ground staff to hasten the check-in for so called "late" passengers. We had opted for web check-in also and although Indigo boasts of just bag drop off facility at important airports no such effort was made even on inquiry and was asked to wait in queue instead .

This was really unexpected turn of events and totally unacceptable. I guess they are actually harassing poor passengers.

Also, In this digital age, such non informative generic slips (that cannot be traced down ) for late arrival are not at all acceptable.