HDFC Bank — Credit card joining fee

I had applied for ahdfc diners black credit via netbanking cards in september 2019.
At the time of application, there was a promotion offer on my net banking which said - "get lifetime free hdfc diners black credit card with smartpay registration at the time of application".
I had registered for smartpay at the time of application.
Later, i was informed that this smartpay offer is not applicable to diners black card. Whereas the offer was specifically for diners black card.
I wanted to confirm this on telephone and was thinking hdfc customer care would call me before issuing the credit card. But, i didn't got any calls and card was issued right away. And now i believe the conditions of the offer are being twisted to charge me annual fee, which is ethically wrong.
After reading this forum, i realised same has happened with a lot of people. This is wrong and hdfc bank should act on it and reverse these fraudulent annual/joining fee charged to customers.
In the screenshot, one can clearly see actual terms and conditions of the offer, which are not honoured by hdfc bank.