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1. Sender's Details: Full name, address, contact information, and customer/vehicle reference number if applicable

2. Date: The date when the letter is written

3. Recipient's Details: Name and address of the service center manager/company, including any relevant department

4. Subject Line: Clear indication that this is a complaint regarding car service

5. Vehicle Information: Details of the vehicle including make, model, year, and VIN number

6. Service History: Date and details of the service(s) in question

7. Problem Description: Clear and detailed explanation of the issue or unsatisfactory service

8. Impact Statement: Description of how the poor service has affected you

9. Previous Contact: Summary of any previous attempts to resolve the issue

10. Requested Resolution: Clear statement of what action you want taken to resolve the issue

11. Closing: Professional closing with a specific timeframe for expected response

1. Service Invoice Copies: Copies of invoices or receipts from the service center

2. Photographic Evidence: Photos documenting the issue or poor service results

3. Communication Records: Copies of previous correspondence or communication with the service center

4. Expert Reports: Any technical reports or assessments from other mechanics or experts

5. Warranty Documents: Copies of relevant warranty certificates or guarantee documents