Air India — denied to issue boarding pass

Address:

122001

Just because of Air India airport staff "Suraj", I missed my flight AI995 on 11-oct and my PNR was H90EJ. Where he denied to issue boarding pass even after I got confirmation from immigration officer where I had some issues with my passport.
Initially immigration officer allowed when I went for stamping they denied for it. And later on after discussing with them they asked me to bring boarding pass where "Suraj" did not listen to me and said I can't give it as flight is already closed and moved from the gate. It was 08:02pm. I requested a lot but he didn't listen at all and at 08:20 he took out boarding pass from his pocket and said now flight is closed. N u can't reach. It was such a ridiculous behaviour of the staff because of dis I missed my flight.