How can I get a pending money transfer deposited on my account?

I've been waiting for a money transfer that should have been deposited on my Citibank checking account a few days ago. Customer service on the phone is completely useless: they can see the money is pending but can't tell me why it's being held up and how long it will take me for me to receive the money. This is causing me inconveniences. Nobody in Citibank is taking responsibility for this.