Race issue

I've purchased stuff at Mr Price Grabouw. Then some didn't fit me. I returned it today(10 September 2020) when I get here the security guard instruct me to give the stuff I'm returning to the cashier. I waited for the cashier till the security guard came to assist. I went to go look for correct sizes. I joined the que. When I got to the same cashier. She decided to help her fellow coloured lady instead of helping me whereas she couldn't do the same with me.

I see at Mr Price Grabouw only people of certain race are special.