Legal analysis: you can complain to the consumer association. Consumers' associations accept consumer complaints and investigate and mediate them. If a consumer complains to the relevant administrative department, the department shall handle it within seven working days from the date of receiving the complaint and inform the consumer. In addition, you can also negotiate with the other party to return the goods. If negotiation fails, you can collect evidence and bring a lawsuit to the court.

Legal basis: Article 37 of the Law of People's Republic of China (PRC) on the Protection of Consumer Rights and Interests shall perform the following public welfare duties: (1) To provide consumers with consumption information and consulting services, improve their ability to safeguard their legitimate rights and interests, and guide civilized, healthy, resource-saving and environmental-friendly consumption patterns; (two) to participate in the formulation of laws, regulations, rules and mandatory standards related to the rights and interests of consumers; (three) to participate in the supervision and inspection of goods and services by the relevant administrative departments; (four) to reflect, inquire and make suggestions to the relevant departments on issues related to the legitimate rights and interests of consumers; (five) to accept consumer complaints, and to investigate and mediate the complaints; (six) complaints involving the quality of goods and services, you can entrust a qualified appraiser to identify, the appraiser shall inform the expert opinion; (seven) to support the injured consumers to bring a lawsuit against acts that harm the legitimate rights and interests of consumers or to bring a lawsuit in accordance with this law; (eight) through the mass media to expose and criticize acts that harm the legitimate rights and interests of consumers. People's governments at all levels shall provide necessary funds and other support for consumer associations to perform their duties. Consumers' associations should conscientiously perform their duties of protecting the legitimate rights and interests of consumers, listen to their opinions and suggestions, and accept social supervision. Other consumer organizations established according to law shall carry out activities to protect the legitimate rights and interests of consumers in accordance with the provisions of laws and regulations and their articles of association.