You could send the knife the your country’s importer and ask them to return it for you.
It sucks to have issues like this, can I ask what country your from?
Sure you can, I'm from Denmark. I'm not sure how to get in touch with the Danish importer (don't even know who it is). Someone else mentioned the possibility of contacting one of the BM's moderators on this forum, which I'll try. Nevertheless, it shouldn't be this complicated, most people wouldn't bother posting on a forum and it should not be a forum post that decides the level of customer service. Could easily have been sorted out if they had offered to pay the shipping cost when I first contacted the customer service.
BTW, sending it back to the vendor, to have them ship it for me is not an option either, since I bought the knife in the US. It will cost me the same as sending it directly to BM.