Work experience

I am an employee at checkstar in Durban. I have been working there for a little over a year now, I have had some personal problems as well as problems with certain managers. Staff are forced to work overtime without pay our hours are cut down to almost nothing there is one manager in particular that I would like to bring to book for not only cutting my hours but speaking of my personal issues infront of staff instead of addressing it privately with me her name is pranitha pillay she is a receiving manager at checkstar I am extremely upset about this and would like to take this up everytime I do talk about the way we are treated other staff has said that the department of labor has intervened but never came back which means they have been bought off. When I told her that I would report her she actually told me to go ahead. Is this how retail is supposed to be?