Call back and asked to talk to the manager. My friend once bought me a ticket using my familiar firstname, instead of the formal one in my passport. The first rep I talked to said I must re-issue. The manager later allowed me to pay $50 to change to my formal firstname, and move my familiar name as middle initials. I also carried tons of other documentations with me to the airport (like pay stub, work ID...etc) to prove that that's my familiar name. Just in case. Hope this will work for you.
[This message has been edited by adamak (edited 06-19-2003).]