Rudeness and obnoxiousness

On the 4th of August my mother , brother and I visited the Menlyn Pringle store. When we first stepped in we were ignored by all four shop attendants, unfazed we stated browsing the merchandise. Then after a while we hear one of the shop attendants obnoxiously shouting (yes shouting) the question \What size are you looking for?"At first we didn't even know she was talking to us as she had not even bothered to move closer and was still behind the counter. When we looked up to see who she was shouting at. When we established that it was us she was shouting at. I answered her that I am looking for another color. Still shouting about the size she stalked out from behind the counter grabs the cashmere sweater I had from out of my hand and incredibly still managed to shout that they didn't have the size. I commented that I wasn't quite sure how to react to all this"