Pathetic excuse for an assistant store manager

I went to pick n pay river Park to get cat food. I saw a big bag under a price of 43.99 and took it when I got to the till point it was much more. One Manager went to look at the price in the aisle asking the packer what the price was he confirmed that it was 43 rand. Not knowing that my partner was in the aisle charline then told the packer to change the price tag before Anyone sees it and came back to me saying it was under the right bag and that I took the wrong bag. After telling her that what I saw is what I took and wanted, two more managers were called(Charlene, Nasiema) who after admitting that this was there fault told me that I was supposed to read the Barcode. Which is not the responsibility of a customer in the first place, the Manager told me that even though the label on the tag was right and just incorrectly placed under the wrong item, they won't give me the item as what I saw it for... period. Charlene is a pathetic excuse for an assistant store manager and she has no customer service skills what so ever!!!!!