Terrible Customer Service

We had just entered the store at around 2pm on the 01/03/2015 and proceeded to the frozen fish section, my wife had chosen an item to put in the trolley when it was ripped out of her hand by Brian, with no explanation. I asked him if there was a problem, and he stated that we are not supposed to open the boxes, we told him that we did not open the box and pointed out other open boxes to him. He was extremely abrasive, at which point we asked to speak to the store manager, he refused to call his manager and arrogantly stated that his managers name is David. We proceeded to the customer services desk, which was unattended, By the time my wife got ahold of the Ambra Jardin, David Botha had appeared at the counter, neither David nor Ambra attempted to hear our side of the story, David immediately accused my wife of opening the boxes. My wife requested them to view the CCTV footage, Ambra indicated that customers were not allowed to view the footage. We tried to explain the situation, yet they continued to accuse us of opening boxes. The discussion thereafter became quite heated. At which point we chose to leave the store. David was quite content to lose us as customers.