Order "delayed" what do I do?

So I pre-ordered Volume 2 way back in September from Amazon...was set to be delivered today, and I JUST got a notice that it's "delayed" until December 9, and that's not even a guarantee. Needless to say, I'm pissed.

Has this happened to anyone else, and should I just cancel it? It sound like they didn't get any, and I doubt they will at a later point, right?