When I called this afternoon, I had the CM say "What disney visa code". I told her what it was and then asked her to type the code in the proper discount code spot and gave it to her.
She said it wasn't working. So I don't know if she actually did it or what. Sounds like it may have not been working since you had a problem too.
Either way it sure was annoying and I only waited online for 45 minutes. When it didn't work, I just got off the phone. I decided not to mess around with it since it'll be public tomorrow.
Maybe that code will actually work.