Indigo Airlines — Refund still not received but Indigo sent message Refund Successful

This is to inform you that I received message thru email (My email Id: [protected]@hotmail.com) on 25th Oct. 2023 from Indigo saying that "YOU HAVE RECEIVED A REFUND BACK IN YOUR ACCOUNT". This refund was is for Ticket not booked, but payment was done so the refund.
But after waiting for 24 hrs I have still not received the payment back in my NRE account of HDFC.
Message in the email is as follows:
PayU
Transaction Id: [protected] Amount Rs. 19647.9 Refunded Successfully
Merchant Transaction ID: 6E-JPAY54b0099ac[protected]
Bank Reference Number :[protected]
Timestamp:[protected]:40:55.309
Refund Mode: Back to Source