"Specials" at Makro? Check your slip!!

<p>This is not the first time this has happened to me, that a special on an item, is still rung up at the original price. Luckily I checked my slip in the car, and I was overcharged by R1000! The supervisors response is, that the cashier should have checked this, but this is not possible, as only a bar code appears on the item?! When i called the manager, she says that they are on a new system and had a lot of these instances over the weekend! So I asked her, what are they doing pro-actively to ensure that customers are not being overcharged? (How many people actually checks their slips?) nothing....and re-actively? Also nothing. I am not convinced that a big company like Makro, can identify transactions, that was rung up incorrectly, and allocate this as a voucher back to their clients?! </p>