That is the right way to go about it as there isn’t really much we can do about it via this forum except acknowledge that this is a most unusual issue that we have not come across previously. However I am confused as to this particular Bartok. I read the OP’s initial post as the Bartok that is faulty is the one he has been demoing “for the past nine days”. He has also bought one but that is yet to be delivered which he confirmed in a post in another thread two days ago when he says that his Bartok will be available next week .
So , first stop has to be the dealer as it seems to me that it is the dealer’s unit. That also opens a question as to its past usage and whether that is linked to the issue.