Citibank Bank Account Or Service Complaint

Citibank Bank account or service department,

Checking account Deposits and withdrawals New York

Bank cashed a check with no endorsement or tracking information. Bank cashed check on - -. I ask for a copy of the check, when the party to whom it was written informed me that he had not gotten it. I received a copy of the check - -. - -, I called Citibank to inform them of the fraud. I received a complaint number, and was told that an affidavit would be sent by mail. I called many times, because I received no affidavit. On - - I was told I could go to any branch and fill out an affidavit. - - I did so. - - I called Citibank for an update and was told they did not receive the affidavit from the branch. They say they are sending the affidavit again by mail. They say this could take 90 days to resolve. Why? This was my rent check.