Indian Railway Catering & Tourism Corporation [IRCTC] — amount not refunded yet with failed transaction after complaint also

Address:

Gaya, Bihar, 823001

I booked a ticket from Gaya to Kalyan on 22-06-17, but ticket not booked and amount debited my bank account of PNB with transaction ID - TXN [protected].
I thought it will automatically refunded as usual. But after waiting long the amount did't refunded. So I mailed to [protected]@irctc.co.in with full detail (screen shot of IRCTC refunded amount and updated passbook where it can be clearly seen that same amount is deducted on same date in the name of IRCTC) on July 12 2017 with ticket ID - IRCTC #6287069.
After waiting for some days I called customer care of IRCTC. He verified the details and mark on urgent basis. I received a mail on July 20, 2017 from IRCTC, saying that -
'Please note that TXN [protected] was a settlement-failed transaction for which no amount was debited towards IRCTC. That is we didn't receive any payment authorization from your bankers to book the ticket. If at all the amount was debited, kindly send us the complete bank statement's (From Date of Booking) in pdf format scan copy/screen shot by hiding the credit card no. to pursue the matter.
I re-mailed on same date i.e. 20th of July 2017 and again I received ticket ID - IRCTC #6337949 on behalf of complain. My mail was -
"I already send you the failed transaction history along with updated bank pass book where it can be clearly seen that on the same date, same amount is deducted by the name of IRCTC.
The amount is deducted and not returned yet. So please do needful. Here I am again sending the same attachment i.e. transaction detail with pass book copy."

Now again it's already 20 days completed but I didn't get money or any reply from IRCTC.
The deducted amount is 6276/-

Please do needful...