Stop and Shop complaint: I was threatened by a worker of Stop Shop

I went to buy a few groceries and there was a guy cleaning up the parking lot. He got mad because I parked in a spot that had trash in it and he rudely told me to move my car. I told him no, I don’t feel as though I have to move my car. I would have moved it if he asked nicely. He began to call me B words, calling me ugly Bs and he told me that he would smack me in my face. I spoke to a manager at stop shop about the situation and he advised that he can’t do anything about it, despite the man being a worker of stop shop. I called the police and filed a police report. I called the corporate office and they told me they are not able to do anything. Is this ok for employees of stop shop to threaten customers? Is this apart of your work policies? This is unacceptable and I should NOT have to be threatened by a grown man for no reason at all.