Of my 180+ ebook purchases almost all of them have been from Fictionwise and this has happened to me a few times. Namely on one of the Harry Turtledove "World War" books, a James Patterson "Alex Cross" book and one of Charlaine Harris's "Southern Vampire Mysteries" books (can't remember which ones...if I had to guess I'd say Book 1, Book 1 & Book 5).
Each time I emailed Fictionwise. They responded that they would contact the publisher to see if a new edition was available. They emailed me back a couple of times to say they were still waiting to hear from them and when they (of course) did not, Fictionwise refunded my money (or Micropay...which ever I used).
Fictionwise is a great company and very responsive to customer concerns. I'm sure you'll have no problem (although I bet with the
Overdrive issue going on right now, they may be getting lots of support request emails and response time may be longer). Let us know what you hear from them.