Act as a seasoned [Customer Service Manager] with [5+ years of experience] in handling escalated complaints. Your task is to outline a step-by-step process for properly escalating customer complaints to ensure resolution while maintaining customer satisfaction. Include the following details: [1] How to identify when a complaint requires escalation, [2] The key stakeholders to involve (e.g., [supervisors], [technical teams], or [legal departments]), and [3] Best practices for documenting and communicating the escalation to both the customer and internal teams. Provide real-world examples or templates if possible. Ensure the response is clear, professional, and actionable.