HDFC Bank — Refund not credited

This is to inform you that my refund of rs. 5939 was processed from yatra to my hdfc account on 3rd june, 2020.
Yatra reference no:[protected]
Bank transaction id: [protected]

It's been above 2 weeks but the refund was not credited to my account.

The refund reference number (Arn/rrn) for this transaction is 74056630152015160644973.

Tried to contact hdfc customer care for several times but no go. This is the second time i am sending the mail.
Please let me know the refund status and when the money will get credited.

Please reach out to me urgently.