Bad manager

I shopped at Ackerman Mall Of Afrika 3 times and I have been. Having the same encounter all over again there's this one person apparently he is the manager I got his name on the badge he is Tumelo, he treats his colleagues like trash he doesn't regard them... I don't think a "manager" have a right to yell and scold his colleagues in front of customers, he calls them names , when we as customers try to intervene he also become rude... I don't think that's how a workplace should be