Incorrect pricing

I often shop at Steeldale Hypermarket and this is becoming very annoying. They adverstise vegetables with a buy two get save R10 on the shelves but they do not implement this. Upon querying tbis I was told that their system does not recognize this special and I had to fill in forms to claim back the Said R10. How many customers check their till slips to see if they got the discount promised????? Also when I got home yesterday I found that I had paid R72 for 18 bread rolls??????? R24 for half a dozen. I have pictures and the till slip. This is ridiculous. I know prices have gone up but WOW .