stock packed under wrong barcode

<br> I am very sadden by the way I was treated today. I was shopping at the branch in Scottburgh Mall,and when I got to the Till one of the product scanned incorrectly, I was overcharged the price I saw on the floor didn't match the one on the till, when I questioned one of the employees she told me that I was the merchant missing he or she is the one when packed in the wrong place,so I asked to get the product at the price I saw but the manager refused to do so even though it was their mistake. This is just example of poor service if you me. cause as per CPA I was right I should have got that product at the price I saw. I then called the Toll free number to complain and I was attended by the lady called AMANDA MKHITHI who was also not really customer friendly, she told me that she spoke to the Assistant manager in the store cause the Store manager wasn't available and that He is going to call me tomorrow, my Question is if the store manager is unavailable who's responsibility it is to make sure that these queries are being address and customers leave the store happy. This is just poor service if you ask me. I think that Assistant Manager needs to attend customer service training cause