Makro false advertising

I was shopping online for a TV and came accross a Samsung 32" TV for R899. What a special! So I took a screenshot and drove all the way from Pretoria to Woodmead to buy the TV. When I got to the store and presented the sales person with the screen shot, he went off and everyone started scurrying arouynd and making phopne calls. He came back with a Kobus du Toit who told me (and another customer who had also found the same online deal) that there was a mistake and it had been recified. He refused us the price that we had both seen and taken screen shots of. He said the CPA protected them from customers like us. What??? So now we were the enemies because Makro Head Office had made a blunder and advertised something incorrectly. We asked to speak to the store manage. 45 minutes later, still no manager except a very agressive and rude Kobus du Toit. He then told us the manager was not in so we asked to speak to the next in line. A Sadia Mahomed eventually came along and greeted us with the same agressive attitude. She then contacted a Paul van der Waal at Makro Head Office and the same poor attitude was given. Makro advertises a price just to pull customers in and when you get there and request the item, the quickly change the system and then say "well it was a mistake". How is this even legal??? Paul van der Waal even refused to compensate for the fuel both of us had spent travelling to the store for an item that was falsely advertised!