In theory, you can tell them to check it and fix it, but in my experience it's a very slow and very annoying process that might last past June 12 anyway, if the company is a big one like Amazon.
I have today received faxes from a couple of my distributors that Complete Champion is in their hands and is starting to ship to their more distant accounts. (Shipping is scheduled so we should all have it for release on the same day - May 15.) Shipping with it is Drow of the Underdark and Dungeon Tiles #4: Ruins of the Wild.