Indigo Airlines — Unethical behaviour with me(passenger)

Address: Kolkata, West Bengal, 700052

I was there at the boarding counter 45 mins prior to the take off of the flight but rather they said that the boarding is closed. Even when I was standing at the queue I continuously asked the people employed there they said I still have time. And the girl who had to attend me said that ma'am just get out and if you have any problem don't travel with indigo further.