Not happy with the service i received

On the 23rd of May, I was at Edgars Clearwater Mall, and I saw Steve Madden shoes with a red price tag of R199.00 on display. I fitted the shoe as it was my size, and I looked for the pair. I went to the tills, where the price changed to R1200.00. I inquired with the lady and showed her the price of the shoe that was on display. She called the departmental manager Clement, who went to the other manager, and he told me that the shoe on their display was supposed to be on the right side, not the left side, and they could not scan the price I saw. They did not even call the people working in that department. Why are they making their faults mine. The store number is ***