Is anyone else being overcharged by Countdown?

We've been overcharged 3 times in three weeks. The first time they charged us for a pawpaw (which we didn't buy), the second time they charged us for eggs twice, and the third time they charged us for paper towels twice. It's not much, but $3-4 each week for a year adds up to about the same money as a whole extra shop.

Is it just bad luck, or does it happen this often to others? The cynic in me wonders if they've found a way to drive up profits without putting their prices up 😏

They refunded us each time, but still...