An employer labels an employee a troublemaker and denies promotion after they raised a formal workplace concern.
This statement attacks the person rather than addressing the substance of their concern, labelling them a 'troublemaker' as a social punishment for exercising a legal right. It also uses the promotion denial as a deterrent to prevent future concerns. This is a textbook case of victimisation — a form of unlawful retaliation expressly prohibited by labour law.
After you respond, they may push back with these arguments. Members get the full rebuttal for each.