Unwanted Neighbour

Time and again this unknown neighbour across the street keeps knocking our door. While Government is still suggesting to wear masks and to protect young and elderly at home, she came into our home for religious fest but i realized later she came in without a mask and when reminded as she was getting up close to my mom to take kumkum, she outrightly dismissed that its all fear mongering government is creating, infact stared at mom when she reminded too and went away. It was very unpleasant. Next time same unknown neighbour arrives again not wearing mask and starts a conversation from our door and very first words are like "this little unit here also is yours" with a questioning face, I asked her politely to go away. We have a door camera and she is aware as she looks at it. She isn't getting the covid point and causing possibly covid spread to my elderly parents by not just wearing mask but also dismissing what government mandates. How can i remind her that she is not welcome to my home anymore as she is indeed causing nuisance. Request your help.