Overcharged for the Same Blouse at Viaport Calvin Klein Store

Hello, my friend and I went to the Calvin Klein store at Viaport AVM (Kurtköy) and bought a black blouse. For size M, the blouse cost 804.90 TL. However, the size M blouse I purchased had a tag that read 993.90 TL. The store clerk informed us that one of us would be charged 804.90 TL, while the other would be charged 993.90 TL. My friend wanted to buy two, but they refused. I was furious; one of us had to pay 190 TL more. It doesn't make sense; if we see the price on the tag, we should be charged that amount. What is causing this? We were both treated unequally, and the price disparity is intolerable. We require an explanation and a just resolution.