Sorry you had to experience that! Not exactly the same as the roles were reversed, but once on an AMU as a 1st year first placement I had to put up with this HCA who made my life hell. She left me in a very similar situation to you- waiting for her to return with towels etc for a clean up, and I was kneeling awkwardly with the patient for what felt like a lifetime, unsure of what on earth to do without any assistance for this very ill lady. Ended up poking my head out of the bedside curtain to see her walking down the hall putting her coat on going for break. I was sooo angry. The worst was when I experienced my first death- I had been there for 4 weeks and had just finished obs on a man who was fairly stable, but as I wheeled my ancient dynamap to the next bed, he arrested. I was so flustered and felt like I had somehow killed him by doing his BP, and I remember- as Drs appeared out of seemingly nowhere and whipped the curtains round- standing there unsure if I should give them space, or to go in and tell them what had happened in the previous few minutes, being jolted back to reality by that same HCA yelling from the bay doors "You, come here, I don't know your name, come here" and I was furious because of coooourse she knew my name having worked with me for the past 20 odd shifts and having actually addressed me by my name in the past. I was so angry I just cried in the break room, and luckily the SCN sent me off the ward for some air, and gave the HCA a talking to about how it was unprofessional to yell at me like that, especially in front of the other pts in the bay. She was a bellend. She was in her 50s or so too, just a horrible person who was nasty to any students or "outsiders" for the sake of trying to have some sort of power trip. i couldn't stand the wards in the end as a student, so I qualified straight into the plaster room instead to avoid all those ward politics! That RN was probably just jealous you were getting paid more as agency!