If the customer is not satisfied with the quality and service of the purchased products, you can take the following ways to make complaints and suggestions 1. You can directly dial the after-sales service hotline of the specialty store in the place of purchase. 2. Visit the official website of Shuangsheng http://daiyasu.cn/guest.asp message management 3. Online QQ service through network: 526592837 (8:00-16:00). 4. Call Shuangsheng home customer service hotline: 400-078-0087 5. Address: No.8, Huayang Road, Xinhua Industrial Park, Wangting Town, Xiangcheng District, Suzhou City, Jiangsu Province, postcode: 215155.