Citibank — Wrong Charge in Credit card

Address:

New Delhi, Delhi, 110049

I am a Citi Bank Rewardz credit card holder. In my credit card statement for December (statement period is from 26th Nov to 25th Dec) Citi bank has included a transaction of Rs 1382.85 dated 16th Nov 2015 which was already accounted for in the last month's statement. The response I received was that the Merchant claimed the amount on 9th Dec 2016 for a transaction done on 16th Nov 2015 I did not conduct any transaction on 16th Nov. with Myntra hence there is no question of being charged for it. The merchant has also responded that they have not done any such transaction They also included late payment charges (though it was reversed) in earlier statement even when I paid my dues on time I believe they are indulging in such practices deliberately and fleecing the customers.