Incorrect price scanned

Again it is me and Pick n Pay Irene mall. For the second time there was an incorrect price scan. This time the manager tried to explain to me that the flash cards do not have a barcode on and that he does not have to let me have product at the advertised price. I am sorry. CPA states that the price you see is the price you pay. I did get it for the advertised price at the end. But he has a terrible attitude. Maybe PnP should implement the "get first item free" again. That will make managers more aware of their jobs that they are paid for. Overall the service at this branch is of the worst.