Wrongly Priced Items

Products in the store are wrongly labeled. One product has more than two prices ( there is a shelf talker price, a price on the product and a till price). I noticed this when I was buying stationery for my grade one kid. An exercise book A4 17mm ruled 72 page was Marked R4.99, the shelf talker was marked R2.99 and the till price was R6.99. The Manager by the name Omar (sp) was rude and asked me to pay the till price or leave his shop (Discount Foods Ghandi Square)