Wrong pricing on shelves

Always when you get to pick n pay the prices are incorrect on the shelves.

Today when I went to buy cereal the sale tags were on the shelves saying R75 for two boxes of Kellogg's including Kellogg's rice crispies. With two different boxes on the shelve I take the smaller box just for them to tell me at the till none of the rice crispies on the shelve is part of the special and they don't sell the one that's on sale.

In my opinion then they should not put the boxes Kellogg's rice crispies that they do have on the shelves right above the special adverti*****t it must be taken of or put on another shelf.

It wastes the clients time when they've been standing in long lines.