Manager raising his voice over their mess up

Went to super spar on the bluff and came across some items that they had priced incorrectly due to \their battery not displaying the 1st digit of their price as customers push it in."I have taken photos of the till slip and the price tag. So the price you see is the price you pay. I asked for the manager to come look at this and sort it out they sent me a lady called Nomusa. She said to me \""nothing can be done\"". I argued with her that that is not true. So I asked for someone in charge who would be helpful. Then a gentleman (if I can call him that) named Ian (Wettenberg or Weddenberg) something like that comes along and tells me the argument that it's not their fault. That their battery is faulty. Then he starts pressing on the price display and voila a 1 appears in front of the price.I start arguing with him that that is not our problem they don't maintain the equipment with the prices. Then another client also gets ********** brings another staff member to show her that the price on the till is wrong. My wife starts talking to him calmly and he starts raising his voice.I told him to raise his voice at me not her.Contact me via email after 28 dec as I will be traveling till March"""