Easily Customize Your Complaint to Neighbor. Are you unsure how to use it for your situation. How To Draft A Complaint Letter For Customer Download This Sample Complaint Letter About Poor Service Te Formal Letter Writing Poor Customer Service Lettering So in order to write an effective complaint letter about poor service do the following. . Provide sufficient information so your reader can find your order. Include serial or model. State your concern clearly giving your reader the benefit of the doubt. Complaint Letter Sample 1. DATE- The senders address is followed by the date just below it ie. But this is not all. But you have not yet received the goods write a letter to your supplier pointing out. Give the date and tell. Ad pdfFiller allows users to edit sign fill and share all type of documents online. Describe the item or service you bought and the problem. Use this sample complaint le...