Unfair customer service

S&K showroom had three different sneakers on an affordable price, I ordered the sneakers and the order was confirmed. Couple of days later I get an email that they will be refunding me because the website had a pricing glitch. How is that the customer’s fault that they had a pricing glitch? Why can’t the store acknowledge that the fault was on their end instead of compromising their customers. I would really appreciate to receive my order that I paid for, it is not my fault that the store had false advertising.