Attitude and Shop closing before business hours

I received the worst service ever at MR PRICE in Daveyton Mayfield Square , I get there it’s 17h52 at the door I’m told they are already closed by the security like how ? When business hours clearly states till 18h00 , I ask for a manager and he comes through with an attitude also telling me that they are closed he said his name is Mandla must have said it with so much confidence because he knows nothing will be done , so disgusting how these black only malls treat black people should it have been eastgate or something none of this would have happened , I want mr price to get intouch with me and let me know if you guys have dealt with this person and their store altogether before I take this up to Twitter too . Very very rude