Final answer:
Calling someone about an overdue bill at work after they've objected likely violates 2)employee privacy rights.
Step-by-step explanation:
Calling someone at work about an overdue bill after the employee objected could potentially violate 2) Employee privacy rights.
Depending on the jurisdiction and the company's policy, it may also contravene workplace ethics and, in some cases, specific company policies regarding contact with employees. If the employee has communicated a preference not to be contacted at work about such matters, respecting their wish is not only considerate but also adheres to the principles of proper workplace communication and respecting privacy.
In the case described, Noel acted promptly and appropriately by using the company's communication channels to alert the necessary parties about the billing error without invading anyone's privacy or breaching workplace ethics.