Just take delivery and you'll figure out how to set up. They are speakers, not something complicated like running a retail audio chain.
Not true. Wilsons are notorious for the effort/expertise required to set up properly for best performance. My guess is the dealers aren’t keen on dealing with your trade-in situation and can probably sell the Wilsons pretty easily to someone without a trade. That’s what I’d be thinking if I was the dealer. That, however, doesn’t excuse them for not their poor responsiveness and communication. Good luck in your quest.