Indian Railway Catering & Tourism Corporation [IRCTC] — no proper response for a refund issue

I have booked a tatkal ticket on 21st april and cancelled the ticket at the waiting list stage after chart preparation but the refund initiated amount was zero.

So, i mailed irctc stating my issue and they have raised a ticket at that time.

Now its almost a month and i am not given with any proper response. I have called the customer care more than thrice and still the same.

So, i request refund of full amount as soon as possible.

My contact number : [protected].
Mail id: [protected]@gmail.com
Pnr number: [protected]
Ticket id: 3703936, 3699092
Refund amount: 1760

Please feel free to call to my mobile number for any additional information if needed.