HDFC Bank — chargeback not credited to my account inspite of acceptance of merchant

I raised a chargeback to HDFC bank for a credit card transaction dated: 7th July 2019 of Rs. 52000.00
HDFC given a reference no for: [protected] for inquiry.

Merchant already confirmed that they given the acceptance on chargeback to merchant bank. The merchant confirmation email also shared with HDFC. However HDFC neither return my money, nor given me a temporary credit till date inspite of my closed follow up with HDFC. I have sent more than twenty email to HDFC regarding this matter.
It is very surprising that HDFC is unable to provide any firm date of return of my money which was already reversed by merchant.

I am being harassed by HDFC bank due to unknown reason.

Regards
Tarun Dey