ICICI Bank — Late payment fee charged on CC

This is regarding late payment charges levied to me on my credit card.

I had called customer care regarding this and explained to him that I was occupied with a medical emergency in the family and hence couldn't settle this on time. All my past payments have always been done before due date. I have been an ICICI bank customer for more than 14 years and have never defaulted/ delayed any payment till date and this was the one off exceptional instance due to an unavoidable personal emergency.
Despite all this, I wasn't given any consideration. This is very disappointing and discouraging to see that i have been a customer of icici bank for such a long time and i have received this kind of response.

So, request you to pls look into it and reverse the late payment charges otherwise i don't have any option other than clearing all my dues and closing this credit card for good.

Looking forward to your positive response.