It's gotta be hard to take. You might be able to get some kind of compensation from the manufacturer, I really don't know. I would put the live rock into large tubs (like 33gal trashcans) and hook up a righteous protein skimmer. If anything's gonna survive that's the easiest method. Let it set in there for 4-6 weeks.
The sand, that's a real bummer. Thing is, we can't tell you in good conscience that you can use it. It would be worse if you tried to squeak it, and went and put expensive animals in there and they croaked, right? Maybe, possibly, with time and lots of rinsing you might be able to salvage it, but it's really much better to be safe than sorry.
I'm bumming out with you, this is no good and not at all fun.