ICICI Bank — Unnecessary and illegal charges for no amount due

I inderbir singh using ICICI Credit Card with registered mobile no. [protected]. last four digits of credit card are 9005,
payment due date was 29 june.
before due date i checked total outstanding amount on ICICI I MOBILE PAY APP, it showed total outstanding amount is 0.
so i havent paid the bill because there was no outstanding amount.
there was no total outstanding amount, as all dues was paid & reversed.

but icici charged me Rs.885 for late fees payment.
i contacted customer care
. At Customer Care Centre, Phone Banking Officer gave lame excuses and did not escalate my complaint despite repeated requests, causing harassment, mental agony and disturbance to me.
kindly look into the matter and reverse the unnecessary and illegal charges