Write a Professional Complaint to HR or Senior Management

Act as a professional communications advisor. I need to raise a formal complaint with [HR_OR_MANAGEMENT] regarding [COMPLAINT_SUBJECT]. The incidents I am reporting are: [INCIDENT_SUMMARY]. I have the following documentation: [DOCUMENTATION_AVAILABLE]. Write a formal complaint letter that: states the nature of the complaint clearly in the opening paragraph, presents facts chronologically and objectively (no emotional language), references any policy violations, states clearly what outcome or resolution I am requesting, and is written in a tone that is professional, credible, and firm.