IRCTC
TDR not settled since 03-Dec

I have filed a TDR on 03-Dec but the case has not yet been settled by IRCTC. I have also sent reminders from time to time but that was of no use as till date I have not been refunded with legitimate amount. The details of the transaction is as below: -

PNR No.: - 6350058900

Date of filing TDR: - 03-DEC

Transaction id: - 0279321900

Ref No: - ekt2010123001854881

kindly suggest as to what can be done in the matter.