We note from your email that have sought for upgradation of your Diners club black credit card to Infinia credit card. Basis your request, we have taken up for an appropriate review and currently upgrade offer is not available towards your card account. We also wish to clarify that the card upgradation would be reviewed based on internal parameters / guidelines laid down by the bank.
Further, we wish to assure you that the upgrade shall be reviewed periodically based on usage and payment pattern on the card account. We kindly request you to use the credit card and provide us with many more opportunities to serve you better.