Sorry about that. It looks like your paperwork fell through the cracks.
Log into https://tickets.evil.internal/ with your social security number. I reset your PIN to 666. File a ticket with HR and call Harlem Muhammad Ozai-Sarkesian to see if she can help push it through.
Legal requires additional identification and a magically binding contract before changing your payment details, so make sure you have two forms of photo ID, and eat a good meal the day before you go, because you're going to be giving a lot of blood. You probably want to bring your own knife, too; they never disinfect the one at the desk beyond rinsing it off.
Let me know how it works out!