Complaint letter After reading 'Formal Business Writing: Resolving Difficult Commercial Situations' by Michael Chambers, I would like to write a letter to a shoes company, because I had a problem with one of their product. I don’t want to write a letter ‘too aggressive’. Could you help me to write a polite (and grammatically correct) complaint letter, please? Dear Sirs, Dear Madam, my name is Andrea and I have been using xxx’s products since a long time. I have used your products in different disciplines and I have always appreciated their comfort and technology, as well as the style. I am writing to inform you about a defect I encountered on my last running shoes. After few months I was using them, two eyelets broke and so it was impossible to do up the shoes properly. I would like to point out that when I was doing up the shoes I wasn’t stretching the shoelace as stronger as I could. I have attached some pictures to allow you to analyze better the problem. As a mechanical engineer, I know how important is to receive feedback and I hope this could help you to work out the problem. I hope also not to have again the same problem with my new shoes I have recently bought. Your sincerely, Andrea