CONFUSED STAFF

I went to the Shoe Gallery in Chatsworth to purchase a pair of black Sissy Boy heels which were marked at R250.I checked all the boxes on the shelf and there wasn't any size 5.I asked a salesman for size 5,he did not inform me of any price difference.The cashier then told my sister (who was paying for the shoes) that it was a 50% mark down so it was R300.I then went back to the shelf to confirm the price but all the boxes were marked at R250.The cashier then told my sister she made a mistake because the shoes were actually R600.According to the manager Kogie who was also at the till, the prices differ according to whether their stock is new or old regardless of the style, which should not be my problem.If the sales man who brought the correct size to me couldn't tell the difference,how am I to do so?I checked the style codes on the boxes which were the same(ended with \5548"if I remember correctly).The manager was not helpful but rather patronising as if we don't understand simple maths.I called customer care to complain.Natassia who said she was 2nd in charge"