RBL Bank — Unnecessary deduction

Address:

Dakshinpuri New Delhi

It was a last 3time which I have to pay extra money for my credit card payments. Usually I paid money on same date which was declared by bank but from the last three they had charged me a late fee charges.
I don't what was wrong with them and even though when I wanted to connect with them they just ignoring and they didn't answered my call. I don't know what's the issue. That's a really pathetic customer service.. Very unhappy
Worst service