Store manager harrassment in front of my child.

I went outside the building to have a smoke, no where did it state it is a non smoking zone As I was putting my smoke out, I was about to pick it up and discard it into the rubbish bin, a woman by the name of Josslyn approached me in a very rude manner and told me I'm littering in a very unprofessional manner. I was about to pick it up, so told her I'm going though it away. She never even gave me a chance to talk and said she is setting an example to my child. She proceeded to confront my child, and I stood in front of her and kindly requests she not come near my child. She replied saying she is the store manager/ supervisor so she can. I feel my rights are violated. If I saw a sign I would gladly not have smoked. It's common sense. She threatened me tellimg me I can't complain cause I'm on camera. Again violating my right to complain. I am a regular shopper at Windermere but I think I'm so humiliated in front of all the people I will never return. She caused a racket and I would like to talk to higher management, since she claims she is the boss.