tHIS SIS BULLYING SO GIVE IT TO HER STRAIGHT!
Say something like, "Right I do not appreciate your rudness and inconsideration. And frankly no one cares about your opinion so keep it to yourself. "" Be firm but not rude so use words like rude and inconsiderate not mean or words that could get you into trouble! After saying this walk away!
Give it a try! Whatever happerns please directly message me to tell me how it went!