You have waited this long, may as well wait a little longer. Cancelling now and re-ordering only means another 6 month+ wait.

You have pointed out your concerns to the dealer and I would hold them accountable. I'm not sure if there's a way to check when they actually placed the order. They may very well not have any control over the import shipping timeframe. I would certainly expect a considerable discount, free servicing or some other form of compensation...