Zambian countries being allowed to take advantage of South African citizen

This department allow south Africans to go work I'm African countries as expats and have no problem with them returning home with no salary no benifits offered by die employment agencies nor the company they work with, gets promises tax free salaries and medical benifits just to return back with no salary no benifits offered and in a specific case malaria and no one takes responsibility and expect your life ensuring company to step in to , at the very least , get you proper private health care, I'm not sure what the department of labor nor department of health feels about this process