In my old part time job, this 50 year old woman, yes 50 year old woman used to have a go at me and yell at me for messing up on the till and getting a customers request wrong, when I had only been working there for a month and had been given very little till experience. Then her other friend who also worked with us who was like 40 would bi**h about me in the back kitchen then the 40 year old one would be nice to my face and act like nothing was wrong when I knew she talked about me behind my back.
I just want to point out I was 18 years old. Anyway regardless I told the manager and the recruitment manager as well and they had the 50 year old moved to another section in the shop but I left soon after anyway to go to uni