HDFC Bank — credit card

I was called by someone from hdfc bank and she asked if I have an HDFC bank credit card. I said yes, then she proceeded to say I don't know anything and I'm wasting her time. This was completely out of the blue. I would also like to point out this was not the first time I observed their customer service being unprofessional.

I have previously also contacted customer care regarding a chargeback transaction and the customer care representative claimed there is no such thing, clearly not even understanding how credit cards work