Negative Staff Attitude

the ICU nurse on duty responded to the patient call bell with a cellphone on hand, not wearing any name tag or distinguishing devices. instead of asking how can I assist, she asked who rang the bell. I as the visitor explained I see the IV machine reporting an occlusion, her response was " focus on the patient since you are here for her and leave our machines alone" I reported the matter to hospital management 7 days ago and it has since been under investigation. the nurse concerned has not even offered us an apology. she identified herself as Tiny Sekele