Pick n Pay overcharging regularly

I have to check my till slip EVERY time I shop at Pick n Pay because even when I shop for a few items it has been my experience that I am overcharged at the till. I then have to go to the shelf and take out the pricing tag and hand it to the teller so they can see what the shelf says versus the till slip. This is not limited to one store as I have experienced being overcharged in Lakeside; Randpark Ridge; Chili Lane and Petervale. In fact the last three times I have shopped at Petervale, all three times I have been overcharged at the till. My advice to shoppers is DO NOT LEAVE THE PICK N PAY STORE BEFORE YOU HAVE CAREFULLY CHECKED YOUR TILL SLIP AND DO THIS EVERY TIME YOU SHOP AT PICK N PAY. If and when you discover you were overcharged then you owe it to the rest of the country to complain about it and add to this post. The only way to limit our being regularly ********** is to put pressure on those who are ripping us off.