Yeah or maybe not having to pay import duties was a big contributing factor in me placing those 25 orders in the first place.The last few pages have been discussing the fact that Norway and probably other EU countries have very recently stepped up their enforcement of customs levies. In any case you should be quite happy that you were able to avoid paying your country’s duties for your first 25 orders, not unhapppy that you now have to pay what you should have all along.
I don't know where you live, but Norway isn't an EU country, nor have they "stepped up their customs enforcement." They have made certain changes to how import fees are calculated, such as removing the sub 350kr rule, but no changes that will impact this type of import. It's still very much common practice to mark packages as low value or sample goods, or similar, and I still receive packages every week without any hitch.
In this country, it is very easy to order something and pay twice or more the items value in import fees. As long as ridiculous levels of taxation like that are in place, people will find a way to avoid it. - or at least the ones with half a brain will.
That said, I'm just a little displeased at the surprise of this, as well as the unnecessary processing fee that I was never given an option to avoid.