Disappointing customer service

I was at the Richards Bay Boardwalk Totalsports branch on Sunday looking to purchase a new Nike running shoe. The shoe that I picked was priced at R1299 on the shelf and was also printed on the box that the sales guy brought from the back(Store room) the item then scanned at R1999 at the till and I was told by the cashier that I need to pay R1999 and not the price marked on the packaging as he was instructed by his manager over the phone. This is really frustrating as the prices on the products are misleading and I know according to the consumer act the price you see is the price you pay. It's not the customers fault for incorrect pricing on your shelves. What is more frustrating is that I activated my discovery gear benefit to purchase this product and now it has an expiry date in a weeks time. I also laid a complaint using the call center CS321159 but its disappointing that I still have not received any feedback as this should have been an easy issue to resolve.