I am writing this complaint in reference to a charge on my AAdvantage Citibank Visa Credit Card account, which I am disputing. At some point in XXXX 2015, my account was victim of fraudulent charges, after which I had to be issued a new card. Upon discovering one the charges ( by XXXX XXXX ), I immediately called the merchant to inform them of that charge ( Ref # XXXX, {$2500.00} ). I also contacted Citibank regarding the fraudulent charge. Citibank promised to investigate the matter but did not readily credit the disputed amount. Given the exorbitant amount of the charge and the fact that I was unsure if the money would be credited back by Citibank, I tried to resolve the matter with the merchant, which took a lot of time and effort. The merchant eventually agreed to issue a courtesy credit of {$300.00} for the pain and suffering that the fraudulent charge had caused me, as well as the amount of time I had spent trying to resolve the issue. Eventually, Citibank also issued a credit on my account for the original amount of the fraudulent charge. On XXXX/XXXX/15, the abovementioned credit of {$300.00} was posted to my account. However, the credit was later reversed on or about XXXX/XXXX/15. When I called Citibank to inquire about why this credit had been reversed, I was informed that the credit had been reversed because I had been given a double credit for the same charge. 
I dispute the fact that I was given a double credit for the same charge. The credit of {$300.00} was specifically issued by the merchant on a voluntary basis, and as a courtesy to compensate me for pain and suffering due to the fraudulent charge and the time spent to try and resolve the issue, while the credit issued by Citibank was for the charge itself. I believe this credit of {$300.00} should either be put back on my account or returned to the merchant, and in no way should be kept by Citibank, as it was specifically issued to me by the merchant and for the specific reasons mentioned above. It would be unlawful for Citibank to intercept and " pocket '' this credit. 
