Robbing Customers - Consumer Complaint for Clicks Store - Head Office

Every time I go into Clicks Mokopane, they charge items on prices not the same as on the shelves. Today again the cashier scanned an item twice. I told her that but she said I was wrong. When I checked my slip after paying, she did indeed scan it twice, thus I paid double for one item. This is ridiculous. How many people get robbed like this without knowledge. I would rather drive to Polokwane from now on and support Dischem.