Worst experience in game trade route mall

I went to game in trade route mall the stuff is race's when they told me i can not take more than 1 case of cold drink i asked why they said that its only one per customer as I asked where those it show that they show a news paper that says limited stock available but no sign to say how many per customer and while telling them that the paper shows limited stock available they started talking in one of their language and started laughing and going on even the management was part of it and they also never let me buy anything else from the store as i was buying stuff for over R600 and they said if I don't leave the store they going to call security for me and started to be really race's and started to call me names infront of all their clients. There service is bad as they only 3 cashier's we had to wait like an hour in the line just to get to pay.