Incorrect Pricing at Pick 'n Pay and general incompetance

Went to Pick n Pay at Woodlands Boulevard, Moreleta Park, Pretoria today to buy some groceries. Bought items listed on their promotional brochure. When I went to the till, I asked the cashier on three occasions to double check the pricing. I read out the prices from the brochure to her for the promotional items. I was not able to check the price on the pillar screen, as it was tilted downward. I also asked her to make sure that the price for the fresh living magazine was deducted, as I produced my smart shopper card. The cashier confirmed that the prices scanned correctly, and the cost of the magazine was deducted. After paying, I quickly glanced at the till slip and noticed an item that was incorrectly priced compared to the brochure. I thus requested to return the item, as the explanation give to me by the supervisor was not satisfactory. A refund for that item was given to me. Upon going home, I looked at my till slip once more, and noticed two other items incorrectly charged compared to the promotion, and the cost of the fresh living magazine was not deducted. I have all my Pick n Pay till slips to prove that I have not taken a copy of this magazine(September) previously. This situation with regards to the magazine has happened to me on three other occasions at this particular store. I have had numerous instances where promotional items are not correctly charged. The sales experience at this store, when compared to competitors is very substandard and wanting. Due to the continued price discrepancies and general pathetic service that I receive at this store, I will no longer be supporting any Pick n Pay store or subsidiary. Good riddance to incompetence and poor service.