Indian Railway Catering & Tourism Corporation [IRCTC] — Tdr refund delay

Address:	New Delhi, Delhi, 603209
Website:	www.irctc.com

This is regarding tdr case generated on 02/01/2016 for the "party partially confirmed/waitlisted and all passengers did not travel" for pnr number - [protected] with tdr generated reference number - [protected] even after continuous follow up refund is not processed. As per communication from customer care tdr case suppose to completed within 90 days of its filling. Also given calls several times to chief zonal officer which was received from customer care officer.
Unable to understand
1. What is the exact process for tdr refund..??
2. What is the upper time limit for completing tdr refund process...???
3. To whom we should contact in case of delay...???
4. Why so much follow up is required if all the processes are set.
Requesting you to please look into the matter and close. Expecting completion of process as its a very long pending.
Thank you,
Regards,
Suhas diwate