Did you call in or just use chat for this? I really need to get on this I don't need my wii u pre order but could use the savings haha.
I just used their Chat option. I work with a computer all day so I would pull up the chat whenever I had some down time.
Took me 4 separate chat tries till I got someone who would finally do it for me. I wouldn't even bother asking if you can switch the item, instead just ask about the credit option.