Sunglass Hut - on sale, but not

They advertise on their website sunglasses for sale. Prada PR 28ZS was R6190, now R4333. When you go into store to buy them, they are full price. The shop manager said he had a lot of customers come in and experience the same thing. On his ins**** tablet, they do not show as being on sale. What a waste of time. They need to get their act together.