To the OP, I do not have the kind of restraint you have and I would have given them a few choice cuss words. Then, I would have gone on here, stated the name of the store and exactly what happened and watch what happened next. With so few audio stores left, they should do everything the customer wants within reason for the sale.
I sold audio from 1972 through 1987. I never turned a customer away and would happily swap speakers in our high end room to accommodate the customers needs. Many of my customers were repeat customers and word of mouth travels fast. Not to brag but I was the stores most knowledgeable salesman and the store folded 5 years after I left. When my former customers came back to audition something and I was no longer there, they left. Quite a few of the customers told the store owner that I was the only reason they kept coming back. Too bad the owner didn’t realize it and pay me accordingly, because I loved my job but I had a growing family.

