Indian Railways
Refund not received

I Had booked Ticket for Mumbai to Nagpur. The Train was late by more than 12 hrs, so i didnt travelled by that train and I Filed TDR on 23/6. Till date (21st OCT) I havent Received the refund. When I tried to call the authorities got same answer its under process... The details are below.

PNR Number: 8344483900 Ticket Type: eticket Transaction ID: 0223525084

TDR Details

Reason For TDR: Train Late More Than Three Hou

rs And Passenger Not Travelled

. TDR Status: Forwarded To Railway Reference No: ekt2010062401358154

TDR Zone: SER TDR Filing Date: 24-Jun

So suggest me how file a leagal suit against the Indian Railways.