HDFC Bank — Credit card charges

Hi, I have a problem with HDFC credit cards, they put monthly late charges for GST. Now my unbilled amount is Rs.2370. i can't pay that amount.
always they put late charges to my credit card. i didt swipe that card for my purpose. last month i take Rs.50500 for the credit card the same as paid before my due date. but still outstanding amount showing Rs.2370.
This issue affects my family and my health. kindly waive off the RS.2370 and close my credit card. i can't pay even one rupee unnecessarily. If you do not waive off the amount, I will need to take legal action to HDFC bank.
without the use of a credit card your side always puts late charges on my credit card. kindly waive off the amount and close my credit card within this month. Hereafter also you side not take action means i definitely go legal.