Dress To Suit Boutique

I am truly not so sure what is happening here.
I bought a shirt clearly marked XL (my bad, I did not try it on, I was in a rush) got home and could not even do up the buttons, clearly mis sized. Took it back less than 24hrs later, The owner would not «exchange it» for being mislabeled rather she put it on consignment, blaming me for not trying it on, rather than admit she was ½ at fault for mislabeling it (btw it went back on the rack marked as a medium)
So not only did I pay retail for it but also only made less than $ 9.00 commission. She made well over $ 80 bucks off a shirt.
Will I go back, probably not. She can keep the $ 9.00 I will spend my money at a beautiful high end retailer on argyle road, when I mentioned its name she curled her nose. REALLY?
I really liked the place, but I can not abide by this kind of childish retailer game. She can have her fancy clothing, I would rather pay full retail than know I was not copulated.

We went there by chance, although I had read about it online. The owner and staff are very nice and courteous. The selection goes from golf shirts to expensive suits. 99% of the clothes are in good to great condition, some were never worn. We bought an Hugo Boss shirt for my husband for $ 20 smthg, they also have more designer shirts, suits, ties and even shoes. Would highly recommend and wil visit again.