How he speaks to his staff

The manager at the Greenstone store has no manners at all, I think they said his name was Peter if I'm not mistaken.The way he speaks to his staff is appalling. My sister has been before and she too has witnessed him screaming at his staff. With me this past Saturday on the 23rd of Jan 16, we had just bought stools and were told to go collect them next door at collections.He started shouting at one of the staff members who had been sent to go to the main store to collect our stools. WHERE ARE YOU GOING HE STARTED SHOUTING WHY ARE YOU SO SLOW. I was very disgusted that he was treating his staff like that in front of customers!!!!!!