Verbally Harassed When Shopping: “The Staff Did Nothing”

I was just in here yesterday buying something when the guy in front of me made a comment about what I was buying. I ignored him and he then started verbally harassing me and saying he was just trying to show me his appreciation and that I obviously never got attention and clearly hadn’t responded how he wanted! It didn’t end there. He then left the shop and because I continued to not engage. He was huge and seemed to be losing control. He kept coming back into the shop to launch verbal tirade on me, and the staff did nothing. They said I was safe when I said I didn’t feel safe!