Checking or savings account: Closing an account

On XX/XX/XXXX, I was unable to access my Citibank checking account. I contacted Citibank and was informed that my account would be closed for suspected fraudulent activity, which I dispute. On XX/XX/XXXX, I received an email from Citibank confirming the closure. At that time, my account had a balance of {$1800.00}. Citibank representatives initially told me I would receive a check for the remaining balance within 60 days. However, when I followed up multiple times, I received conflicting information. On XX/XX/XXXX, I visited a Citibank financial center, where I was told that my account was actually closed on XX/XX/XXXX, XXXX XX/XX/XXXX as initially stated. Because of this, I was informed that I needed to wait until XX/XX/XXXX, to receive my funds. Despite waiting, I have yet to receive my money. When I contacted Citibanks fraud prevention service today ( XX/XX/XXXX ), they informed me that, after their investigation, I am not owed any money. I believe Citibank has not provided sufficient explanation or justification for withholding my {$1800.00}. I am requesting that Citibank clarify why the account was closed and either return the full balance or provide a clear, documented explanation for withholding my funds.