Everyone knows if a train is running late, ONLY RailFans know WHY it is late

Dear Sir,
I had filed TDR on 12.11.2013 for PNR NO. 8617551882 as Party Partially Confirmed/Wait listed And All Passengers Did Not Travel (as only one got RAC out of four).
But I have not receipt the refund amount since more than 4 months passed. I written so many mail to tdrprocess@irctc.co.in and to care@irctc.co.in. latest reply from tdrprocess@irctc.co.in is as: "Dear Customer, Sorry for the inconvenience.Kindly note that your refund case of PNR No.8617551882 has been forwarded to CCM/ER Railway on 12-Nov-2013 .We have already issued Reminders on 18-Feb-2014 to concerned railway...
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to chase up the case.But despite reminders refund is yet to be received from the concerned railway.Now we have sent another reminder on 19-March-2014 with all the papers pertaining to your refund case to concerned railway to chase up the cases. As soon as refund, if any, received it will be credited to your card account.
With regards,
TDR TEAM"
But then also I have not receipt, Kindly advice me, whom should I contact now.
regards,
Subhash Singh