I am writing to inform you that my packages have repeatedly been delivered in an unsatisfactory manner. Over the past few weeks, your postman has placed several notes in my mailbox stating that I was not home at the time of delivery. However, I have been at home every time. In fact, I once saw the postman walking away from the mailbox, and later found a missed delivery note in the box.
This is an unacceptable way to provide service. Each time the postman claims that I miss him, I have to pick up my packages in person from the post office. This is a waste of my time, and is certainly not what my shipping cost is paying for.
I would very much like to receive a response detailing your plan to improve your services. Please feel free to call me at 555-555-5555. I look forward to hearing your thoughts on this issue.