Price fixing at Rage key-west

I went to Key-west rage to buy a shoe I saw week ago before I could pay I checked the price and told the shop assistance my size she went at the back and come with a box and told me that the price is R255.00 I told her that is not the price I saw on the displaced shoe , she went and check, come back and told me it is R255.00, I went back and check she had removed the price, when I asked her why did you lie to me about the price she told the price is R255.00. No explanation pay R255.00 or leave just like that.