Flipkart — Flipkart refund not credited to my account

Have purchased a Tokyo Talkies Full Sleeve Solid Women Sweatshirt for rs. 328/- on 16.02.2023 and due to defects the same has been taken return with refund initiated on 21st feb 2023
They said that the refund has been done by sellers stating that:
"below are the details to confirm that the refund has been successful:

Refund reference number:[protected]
Refund date and time:[protected], 07:04 am
Payment mode: netbanking"

And ask me to contact my bank, the amount is still not reflected in my account, i have contacted multiple times to flipkart, they gave me every
Time the arn number and ask me to contact customer services
To trace the amount, but my sbi bank says myself should contact flipkart as they do not find those reference number or arn valid to trace from bank branch. Please help me out of this, do the needful to credit the refund to my account.
May be the transaction is pending please clear this