Stradivarius Charged Me ₺2290 for Boots Labeled as ₺1190 and Refused to Honor It

I bought a pair of boots from Stradivarius. The price tag showed ₺1190, and I tried them on, examined them, and decided to buy them. I also purchased a few other items, paid at the register, and left. Just as I reached the door, I checked the invoice and saw that the boots were charged at ₺2290. I immediately went back to the cashier and pointed out the mistake, requesting to buy the boots at the price listed on the tag. The shopping mall was about to close, yet they made me wait at the counter for 20 minutes while people kept coming and going. Eventually, they told me they could not sell the boots at the tag price but were willing to take them back. I will also file a complaint with the Consumer Arbitration Committee about this. How is this an acceptable way to run a business? A cashier named S*** told me that they could never sell the boots at that price and even laughed, saying I should have noticed the price difference before paying. It was unbelievable. What kind of working principles do they follow? How do they justify this approach? When I tried to take pictures of the invoice and the price tag, they attempted to take them from me. In the end, I had no choice but to return the product. They wasted my time and left me feeling completely misled.