IRCTC - TDR refund approved amount not refunded Status PAYMENT UNDER PROCESS case old than 6 months S

TDR approved [amount not refunded]. Status: PAYMENT UNDER PROCESS [case old than * months]. Status not changing.
I have been raising complaints on Twitter, Railmadad, emails, etc. But it is not working through.
Reply from IRCTC Support:
"
Kindly note that Railways has approved refund amount of Rs.****/- against Pay order no.**** dt.**/JAN/**** for your PNR no.**********. But the same pay order is yet not received by IRCTC from Railways, as soon as it is received the due amount will be credited back to you.
"
But the fact is CHEQUE IS ALREADY ISSUED TO IRCTC [refer screenshot "latest-status-TDR-Feb"].

PNR Number: **********- Train fully Cancelled
TDR Current Status : Reg No #************ : Refund approved -PAYMENT UNDER PROCESS – Rs. ****
TDR File date : **/**/****
TDR Refund approved date : **/**/****
Pay order date : *st Jan ****
Zonal handling my case : NORTH WESTERN RAILWAY [cco@nwr.railnet.gov.in]


“IT’S BEEN MORE THAN SIX MONTHS I AM WAITING FOR REFUND”
railmadad complaint id: *************[latest], *************
care@irctc Ticket Ids: *******[latest], *******.

Requesting you to take a registered complaint for this TDR pending case.
And help me with whatever in your capacity you can do to make this refund process faster.

Thanks.