Misleading pricing

They adverised Sunlight washing powder, 3kg, assorted for R77.99 I selected the Sunlight powder-auto wash. At the till theu said this price does not apply. I pointed out their sign did not exclude this. It stated "Assorted". This is misleading advertising. They did not honour the price. Thus I did not purchase. This is the 2nd time I experienced this with pick n pay. Their advertised price is not specific to a product. So as a consumer you choose accordingly only to find out that it does not apply.