I finally got on the phone to them this morning. I had tried on New Year's Eve, but they were closed that day which didn't lighten my mood that much. So, at 9.05am this morning, I was on the phone to the Dutch Ministry of Justice. To ask them where on earth my 'I am a nice person' form is!!
Well, it turns out I am a nice person, since they sent it on December 19th last year!! Meaning, the Norwegian postal services are very very slow. I knew that to begin with, but still. So, I am hoping that it will arrive this week so I can start driving as soon as possible.