Explain the problem. Take a look at this example complaint letter for ideas on how you should approach writing a letter of complaint.1. Contact the company's customer service or escalation department. 2. Use consumer protection websites or forums. 3. If you wish to submit your complaint form via US mail, please complete, print and sign the Printable Complaint Form and submit it to: The Division of Human Rights complaint form is available at the below link. You may use this form to file and submit your complaint online. I'll share with you my top tips to writing a beautiful complaint letter that will help you Ace your exams and stick around till the end of the video. Making a Poor, Bad, Rude, or Service Complaint Letter Is Easy with Template. Net's Free Template.