Makro - Overchaging customers

It's a pity I cant give "0" stars as Makro doesn't even deserve 1. I travel a distance to Makro quite regularly to take advantage of their many specials. Unfortunately i will be changing this as the last few occasions the specials go through at the normal price. Today, I was overcharged around R200 due to this happening. Specials such as 4 x Round Bacon, 6 x Dettol Hand wash refills, 2 x Pantene shampo....... all went through at the normal price. I will be going back to my local Pick and Pay which will allow me to travel lees and probably pay less if this is how Makro treats their customers.