Who says South India does not have Gatimaan. It is called Vaigai Express. - Thamizh Maran

Hello everyone,
I filed a TDR for my ticked :
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TDR Transactions Details
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Transaction...
more...

ID: 100000286697383 Train No./Name: 12512/RAPTISAGAR EXP PNR No 4523004934
Date of Journey: 01-Dec-2015 Date Of Boarding: 01-Dec-2015 Date of Booking: 03-Aug-2015
From: CHENNAI CENTRAL (MAS) To: KANPUR CENTRAL (CNB) Boarding: CHENNAI CENTRAL (MAS)
Resv Upto: KANPUR CENTRAL (CNB) Quota: GENERAL (GN) Class: SECOND AC (2A)
Ticket Amount:7190.0 Ticket Type:E-ticket
Passengers Details
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Name Age Gender Status Coach ID Berth No/ WL No
LOKESH KATIYAR 38 Male CNF A1 30
SHWETA KATIYAR 35 Female RLWL 1
MEEHUL KATIYAR 6 Female RLWL 2
TDR Details
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Reason For TDR: Passenger Not Travelled.
TDR Filing Date: 01-Dec-2015 23:15:02 HRS TDR Status CR Repudiate Cancellation ID: 100000078518712
TDR Zone: NORTH EASTERN RAILWAY (NE)

Reason for TDR Registration Failed: Invalid TDR Timestmap : CNF
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The Status they mentioned is "CR Repudiate", though 1Dec all trains were either cancelled or running late.
I am not sure why they are not willing to refund my money ?
Please suggest way to get my money back.
PS: even train was late by more than 3 hrs @ chennai central.
Thanks
Lokesh