Can you see any green if you scratch the bottom portion? This has happened to me too. I sliced the bottom with my pruning shears to see some signs of life. At first all I heard was a cracking sound, then about an inch up it seemed OK. Still, I managed to root 1/3 cuttings with the use of liquid rooting hormone.
A friend soaked his in water for a couple of days but they all rotted later on, so I would not recommend this method. And by the way, the Department of Agriculture may show up at your door due to the country of origin, so be prepared.