It does sound like they could have handled the situation better, but honestly, that was a poor move.

There are ways to verify with them, wait long enough to make sure the goods get shipped, and then give 2CO reason to believe that fraud or a mistake was involved, in which case they'll just cancel the thing and refund back to the buyer.

You need something with insurance on it and designed for the large amounts you are dealing with.

Hope you get your goods back.