Some social issues, problem and their solution is provided to you as a statement you have to mark the logical action that can be taken under these conditions.
You work in a customer service role, and a client calls in extremely upset about a billing error that has caused their service to be interrupted during a crucial business period. They are shouting, using profanity, and making personal attacks on your competence. You discover that the error was actually caused by a miscommunication between your company's departments, and the client has a legitimate complaint. However, your supervisor is listening to the call for quality assurance purposes, and you know that how you handle this situation will affect your performance review. The client is demanding immediate action and threatening to cancel their contract. What would be the most socially intelligent approach?