Pathetic customer service

I shopped at Checkers Mall of the South on Saturday. I noticed the price of Dr Oetker's mini pizzas scanned at R51,99 rather than the marked price of R49,99. I mentioned this to the cashier and took her to the isle where the product was to prove to her the correct price. We went back to the till to get the Sales Manager to undo the previous price. I mentioned to the Manager prices should scan correctly as it makes me wonder if all the other prices were correct. The Sales Manager Cathy Romashaba did not apologise for the error but rather stated it is the customer's responsibility to check the prices are correct. I stated there is no time to look at every single item being scanned as I place it on the counter. If the store is busy it will result in long queues with people getting frustrated if all customers have to do this. There was complete arrogance in her attitude. I spent over R1000 for my groceries to be told I must ensure the prices are correct. This is disgusting customer service.