Spice Jet Airlines — just 5 mins late for check in

Patna to delhi flight no. Sg 8722 travel date 06 july 2019 dep. Time: 3.10pm from patna the check-in counter was closed before 45mins. I was juste 5 mins late for check in first they didn’t let me check in, there was 40 mins left for the flight to depart, i requested a lot to the team. Over that staff was very unsupportive. The air craft supervisor could not consider one passenger. A repeat tone parrot “sorry” we cannot do anything.
They didn’t help me with any other alternatives. The cause a lot of inconvenience to me because of which i missed my flight. They didn’t even help me with any kind of information regarding alternative flight n refund. Staff behavior was very impolite.