Nist investment bad treatment to workers

The security of Steve Biko Academic hospital which are working very hard in the hospital they dont get recognised at the hospital the company Nist Investments is firing people and hiring always they dont pay workers accordingly and workers are scared to speak out and remember we talking about parents who work hard for their children to have food what cn be done about this company which is threatening people in front of the client n the client keeps quite department of health please look in this matter