Spice Jet Airlines — non payment and harassment by spicejet airlines.

Dear sir/madam,
I booked a ticket for me and my wife in spicejet website on line from chennai to tutucorin by flight number sg 3593 flying on mon sep 4 2017. I booked my ticket well in advance on 25 aug 2017 and the confirmation number (Pnr) is zfkb2u.
Since i came from riyadh and i was travelling, i could not do web check-in. The flight was at 1.15pm and i reached the airport at 12.30 p. M. We had no check in baggage and we were having only hand luggage. I have to stand in the queue for 5 minutes to reach the counter to check in. At 12.35 the women staff in the counter refused to check in. Upon my wife’s request and pleading she called her superior (Mr. Surendran) and he came at 12.40 and refused to consider our requests and pleadings. I urged the manager mr. Surendran to endorse in my ticket, the reason for refusal to check in. Mr surendran made an endorsement stating that the passenger reported at 12.44 and signed. However, to come out the airport, the spicejet staff member who came to enter in the crpf register, to allow us out of the airport took the ticket printout. As i was also in the disturbed mood did not take the ticket back.
The ticketing system and policy of spicejet airlines makes the ground staff to harass the passengers and not considering the passengers humanly.
Spicejet also has not paid me back the full refundable amount.
I would request the concerned authorities to impose strict policies on the airlines not to harass the passengers like what happened to me and to pay the refund amount within 24 hours.
I request the authorities kindly, to look in to the above complaint and order spicejet to return my dues at the earliest with interest.