Bad treatment

I went to buy few groceries at Spar in Germiston South, the one in Webber Road and decided to grab a russian, first of all, the service was so poor, the ladies there were just standing at chatting to one another and not bothered by our presence and only one lady was helping, finally one lady decided to come and assist us. I asked for a small russian which took more or less 10 minutes to be ready and the lady was helping other people while waiting for my Russian. The Russian finally came and when I raised my concern about her being slow, she started shouting at me telling me how she can't do anything about the stove if it's slow and how she can't not help other customers because she has to look after my russian, she was literally back chatting at me. I went to pay and asked for a manager on duty and while I was asking the cashier, she asked what the problem was and I told her, she told me that this is not the first time they get complaints about the people that work in the kitchen/food section. I don't like the way I was treated by that lady and how she was shouting at me infront of the customers, they are extremely slow in serving customers