Checkers ripping customers off

Checkers Boksburg rips off their customers and blames head office. I trolley full from checkers in North rand road and spotted 2 items that I was overcharged for. A camping chair marked at R99 was charged at R119 and protex soap marked at R9.99 were charged at R12.99 each. I informed the cashier of the incorrect prices and after sending someone to run around and get the correct prices, a manager came to correct the prices on these particular items without even so much as an apology. I asked them why are the prices wrong and how can I trust that there are no other items incorrectly charged that I didn't notice. The manager said that head office Is to blame for the incorrect prices and the cashier suggested that I write down all the prices as I take items from the shelves and then double check them at the till. This makes me ask the question, how many millions has checkers been over charging their customers? I for one will never be ********** by checkers again.