I would contact the manufacturer direct

because that is a manufacturer warranty due to the fairly new age of the machine. I’d be polite in my email and state that you feel they are being poorly represented by this third party because it is after all the manufacturer they are representing them. In other words go up the food chain. You won’t be out anything, because it takes very little time to send an email, and they need to know how they are being misrepresented by this third party.
It would not hurt to put in your email somewhere that until the paddle broke how extremely pleased you were with their product, but the inability of not being able to use it at this point is starting to put a bad taste in your mouth. Sugar and vinegar at once so to speak. I have often found it is better to go directly to the manufacturer than mess with the middle guy.