This is against the law.
The store and employees can be reported to the wage and labor board.
Here is a link to get you started on a search for your rights in your state. Do not put up with this.
I would suggest getting information, find a lawyer, know your rights. Video tape this people harassing you. They most likely will think it is hysterical.
But only video them if you feel safe. https://www.stopbullying.gov/laws/federal/index.html
Peace and strength