Dear uttamuks,
Firstly, apologies for the delayed response. It took me long to respond but it was only due to investigations with the bank on the same.
I'd like to confirm that the cash back reversal has been initiated from our side and should reflect in your credit card statement. If it is not appearing in your statement please check with your bank.
If the problem persists please feel free to write on this thread.
Keep posting!!
Regards,
Indraneel