2. Prepare complaint materials: Before making a complaint, you need to prepare complaint materials, including the specific content, time, place and relevant evidence of the complaint.
3. Submit a complaint application: You can submit a complaint application through the company's internal complaint system, telephone or email. And you need to provide relevant complaint materials.
4. Waiting for the result: the company will investigate and handle the complaint, and give a reply and handle the result within a certain period of time.