Same item scans incorrectly for the third time over a two month period

I bought the first jar of olives sometime in October, and at the till I noticed it scanned incorrectly. I had to wait approximately 20 minutes with a screaming toddler in the trolley before the transaction was corrected. About 2-3 weeks later I was back in the same store, bought the exact same item, and then after paying noticed it had once again scanned incorrectly. I bought it under management's attention, but not wanting to wait 20 minutes I left without getting my money back. More than a month after this incident, I was back thinking that they've had enough time to fix their mistake. Low and behold...same item, same issue. I've send emails to PnP and all they say is that they will get back to me, but never does. I would like to know how many people did they ***** from? People who bought the product after it was brought to their attention that the price scans incorrectly? Shame on you Pick n Pay for *****ing from your customers. And shame on you for taking so long to fix errors at the till...I'm convinced you do it on purpose so that the customers won't wait around to get their money back.