I would not wait silently. Once you do that, you've "accepted" the trade and are only bargaining for a free upgrade.

Let it be known as soon as possible, as high up in the hierarchy possible, that you feel cheated. Say that nothing short of an N950 or possibly the N9 can even compare to the N900, that the E7 can't do any of the things you bought the N900 to do. I think you should press that unless they can deliver according to the consumer law and give you a phone with equal functionality as what you bought, you want your money back.

I don't think this will work, but I am pretty sure you're not going to get anything other than an E7 or N8 unless you press hard.

Edit: you're "lucky" that it was the USB that broke, since this is a design flaw and you get your "5 år reklamasjonsrett" without argument. In Norway, according to this, you can have a replacement or the full money back. Your job is to prove that the E7 is no replacement.

Edit: furthermore, I believe it's quite possible to get a tech hardware site to write an article about your case, if you present it in a good way. In example amobil.no. If you can show the writers there that Nokia is trying to make you accept a lesser product, then they may write an article about it. If that happens, your case is as good as solved. Well, at least you'll get a better offer.