Unpleasantly rude & disrespectful behavior by crowthorne superspar store manager

I was at Crowthorne superspar around 13:30 this afternoon finilising my shopping, out of no where the female store manager in charge shouts to one of her staff members not even considering that there's customers around, I was so irritated by her unprofessional rude behavior I nearly left my shopping, horrible shopping experience I've had, that was not necessary, if that's how she deals or conducts business then I'm not shopping there anymore.