No black kids allowed at Clicks Vaal Mall

My kids ( ages 11-14) walked in at Clicks in Vaal Mall and I was coming behind them and I found the security lady stopping them asking them what they wanted alone in the shop and they must not enter the shop because black kids are very silly in the shop, I took out every curse I could get out of my mouth for that comment! So when I asked to see the manager and I was told the manager was not around and the assistant manager is busy cashing up! My kids want to know why does Clicks not let black kids in their shops and I want to what are we teaching our kids Clicks!!!