Mr Price Group / MRP review: Bullying

Good day, please do post this on my/our behalf.

My sister is being personally bullied by a lady called Phutego Seanego at Mr Price [protected]@Reds she comes home everyday crying about this lady who treats her badly that she believes she has a personal vendetta against her, she always threatens my sister by giving her warnings even over little mistakes, My sister is not allowed to make even the slightest mistake she literally yells at her in front of customers and i went there few days ago to witness this and during my sisters lunch and knock off time she was crying and went home crying still because it ended up being hard for her to contain this whole thing, Phutego wants her out of that store because she always mentions her being fired, or things like if my sister wants to resign she must just do it. She's been trying to contact their complaints board but can't seem to reach out to them and to our Findings my sister is not the only one who's been bullied by this Phutego there's also a young lady who used to work in Pretoria where phutego was also shared her story to my sister, so I'm asking if the situation is like this what must happen next because my sisters mental health is being purposely provoked each and eceryday that she says her work environment is toxic and only because of one person. There are certain things or should i say rules set my the company that everyone has the right to do but just my sister is not allowed to do. She gives good customer service but still seems to be a problem for her assistant manager. Please do help us find a way on how to deal with this Phutego because as much as she wants my sister out of mr price she does wanna resign because of her but she can't because she's got responsibilities but cannot take the bad treatment she's getting from the store's assistant manager.