Citibank — Credit Card : Unauthorized Credit card charges after blocking of the card

Address:

R4-A/G, G Block BKC, Bandra Kurla Complex, Bandra East, Mumbai, Maharashtra 400051

Hello,
I was using CITI credit card since 2015. Recently in the moth of July there was fraudulent transaction and i have blocked this credit card. I have received last statement of this card in July stating dues payable as "0".
Today I have received notice of payment of Rs. 1206.06 due for payment immediately. What is this? You people try to threten to affect my CIBIL score for non payment.
I am the credit card customer of CITI Bank since 2015 and have reissued another card in the month of August 2020.
Please provide me reasons for no reminders of payment (Just SMS that too dated 26.03.2021).
Please provide satisfactory reply and arrange of repayment of Rs. 1206.06 with interest paid by me today or else i will swaitvh to another credit card.

Name: Anuja Rakesh Bhandari
Credit card No :[protected]
Phone No [protected]