bad treatment of workers

A manager by the name of Rose Padi is treating her worker's like they are slave, my sister comes home crying everyday. She is scared that if she speaks out, she might get fired. She had a day off on Thursday, but was called to come in, she explained that she wanted to do laundry as all her clothes were dirty. Bare in mind that it's not a \must\" to come in when you are off. When she came in today she was told that she no longer have a job and she won't be paid for the hours she had worked last week."