Air India Express — Refund for Confirmation #6ONUA9

I would like to request for refund for ticket #6ONUA9 for MAA - KUL on 24th June 4.00pm. We came to Chennai airport on 24th June at 3.00pm because stuck in heavy traffic jam and the counter just closed. I've talked to supervisor over there, at least let us go with hand carry bag but he not allow us to do check-in. But the boarding time only at 3.30pm. When I asked air india express counter, they said i can refund the taxes. already sent many emails to [protected]@airindiaexpress.in, sg.[protected]@airindia.in' 'radixx.[protected]@airindiaexpress.in, [protected]@airindiaexpress.com and there is no reply.