Air Asia — not allowed to board the flight

I regret to bring to your notice about the pathetic situation and trouble that i went through on 17-nov-2018. I and my partner were supposed to board the air asia flight i5-510 on 17.11.2018 from kolkata to hyderabad (Pnr no. : ek37qy). The flight was supposed to take off at 4:40 a. M. I had already done web check-in about a week ago. I reached the baggage check-in counter at 3:35 a. M. But there was huge rush and long queue. So i asked the manager of air asia to give us preference as our flight was just an hour to take off. He asked us to join a shorter queue of around 5-6 people. We joined the queue and we're waiting for our turn. When our turn came the staff member on the baggage counter denied to take our baggage for check-in, stating that the counter is closed for any check-in for the mentioned flight and asked us to talk to manager. We immediately went to the same manager and told him the matter, he talked to them but they didn't agree. The manager finally asked us to make a choice like we can board the flight without the baggage and the baggage will be sent over to us next day via another flight to hyderabad and we can collect it from hyderabad airport on next day. He asked us to decide within 5 minutes. We requested a lot to find another option but they didn't listen. I even asked the manager that if we board the flight and you send over the baggage the next day what is the security for that. But for this he never gave any assurance. Finally we could not board the flight and around rs.4800 was wasted. After the flight departed i cancelled my ticket but never received a refund. I had to book another flight for the next day for me and my partner which costed me around rs. 14000 (Pnr no. Il9svl, st179q).
There was lot of inconvenience and money wasted in the process due to poor management. If the manager himself is not assisting, whom can we ask for the help.
I request you guys to take strict action and refund the money which was wasted in the process.
It was worst experience with air asia and i pledge to never ever board a flight from the same.