Food*****s staff are threatening foreigners with violence!

My Step-daughter's husband, a documented Ethiopian National was purchasing meat for a braai at Sunward Park Food *****s market yesterday. At the meat department, as he was asking the black workers to pack the meat in a certain way, one of the ladies told him, "WE'RE COMING FOR YOU". He asked her who was coming for him, and she answered :, THE ZULUS! The other 2 ladies agreed and laughed. The issue was reported to the manager named Francois, who spoke to me and claimed he had no access to the cameras, but that he would investigate and call me during today. That call never came. Is this now how Food *****s staff threaten foreign nationals? How safe is it for foreigners to eat their meat and produce? I am seriously desturbed over both the actions of the staff as well as the manager who could not liase with a client.