As an operations manager, create a comprehensive set of Standard Operating Procedures (SOPs) for a customer service team. The SOPs should cover key processes such as handling customer inquiries, managing complaints, and processing returns. Include step-by-step instructions, role responsibilities, and guidelines for maintaining quality and consistency. The tone should be clear and instructional, providing a valuable resource for ensuring efficient and effective customer service operations. Use a format that is easy to update and distribute within the organization.