Freds hardware to be avoided at all costs!!!

I went to purchase a bag of cement. On the large advertising board outside it says R60 per bag. I order 1 bag to be told this is no longer available and R70 is the new price. This is not legal according to the CPA why are things like this not being policed? This is not legal. I will certainly not use them again as this is *********, immoral and dishonest.