Always incorrect prices

Today I visited Bloemhof Spar. Two of the five items I bought had the wrong prices. Thus 40% of my basket!! I was charged more at the till than the shelf price. This is not the first time it has happened to me at this specific store. I pointed it out to Management and actually had to go and get the sticker from the shelf before they believed me! I was rudely told by the brother of the owner of the store that it is not their fault the prices are incorrect. Head office is to blame as HO changes the prices of the products up to 3 times a day and it will cost them millions (his words) to keep the prices up to date. H e very rudely told me that he will give me the goods at the price on the shelf. He said it as if he was doing me, the customer, a favour. It is my right to purchase the goods at the price shown on the shelf. Three weeks back I also bought mince from their butchery that was off. Never again will I support this Spar if this is the way they treat customers. I will rather drive 60 km to the nearest Pick n Pay for better quality goods and service. I will tell all my friends about this incident! I have the slip to proof today's incident.