Question: what does the law say in SA about family members working for the same comp.especialy if the dad is the manager 

Answer: You need to read the companies SOPs or employee hand book. If the company doesn't have a policy against it I don't think you have a grievance. If you were treated unfairly and can prove it you can call the state or federal govt. human rights and file against them. After 3 years you may hear something.
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