Threatening Trolley pusher

I went to the mall yesterday to get a few urgent items, one of the items was large and I was walking from one side of the mall to Pick n pay to get groceries. I had my daughter with me and my baby. I needed a trolley and so I went to the entrance to get a trolley and was met by a very rude man telling me I am not allowed to take one of the trolleys. I told them man that I was on my way to Pick n pay and that was a pick n pay trolley so I dont see the issue, he told me his supervisor instructed him, I then asked to speak with the supervisor and he started threatening me and telling me I will deal with him. He then started touching my personal stuff. I feared for the safety of my children and myself... This person needs to be dealt with, this is very unprofessional and not acceptable. I will not be going back to that mall ever again.