I'm so sorry that you had to go through that, Luckygirl. That is appalling behaviour - how dare she tell you what you 'must' do with your own mobile phone? You could contact PALS and ask for someone to have a word with her about her attitude.
I was at the hospital last week, and there was a mix up of some sort, so the list at reception was different in a number of details from the reality of who was waiting to be seen. A nurse was trying to sort it out, and kept coming into the waiting room shouting through his mask and asking questions of the patients, including why they were there (it was a phlebotomy clinic, so everyone needed blood taken, but for various different reasons), their name, address and DOB - so much for confidentiality! A couple of people were a bit confused, and everyone was fed up, as they were running over an hour late, and the car park charges were racking up, but the nurse was getting really ratty as time went on, and I felt sorry for the older people who didn't seem to understand what was happening.
I know staff are stressed, and I have every sympathy, but there is no need for rudeness.
I hope the rest of your appointment was ok, Luckygirl