This seems to be the result of poor customer service training, unless it was Mark you spoke with? If I worked at BD and were too busy at that point to discuss your options, I would've asked for your email address so I could send you links to some relevant cabs in stock when I was able.  That shouldn't be too hard and would keep you interested. 
 
	 
 
	In my experience, many music shop employees are budding musicians first, with little to no CS training.