The Athletes Foot

I was served by an arrogant and unhelpful staff. Told me they don't have sz6 in the shop and offer me to try on sz7.5.?? Wouldn't you tell your your customer that you will try to get the correct Sz in instead they suggested 1.5 Sz bigger which obviously too big, they obviously doesn't care if they gets my business. I will not set foot on this shop as they are not so called master fitter of the shoes.