Legal analysis: Complaint channels for failed medical cosmetology: 1. If medical cosmetology fails and causes a medical accident, you can complain to the health administrative department; 2. You can report the complaint to the Market Supervision and Administration Bureau; 3. If there is With sufficient evidence, such as chat records, invoices, medical cases, surgical orders, medical loans, etc., file a civil lawsuit directly with the People's Court; 4. Call the mayor's hotline 12345; 5. Complain to the Consumer Protection Association.

Legal basis: "Consumer Rights and Interests Protection Law of the People's Republic of China" Article 39 If a consumer rights dispute arises between a consumer and an operator, it may be resolved through the following channels: (1) Negotiate and settle with the operator; (2) Request mediation from a consumer association or other legally established mediation organization; (3) Complain to the relevant administrative department; (4) Submit it to an arbitration institution for arbitration based on the arbitration agreement reached with the operator; (5) File a lawsuit with the People's Court.

"Regulations on the Handling of Medical Accidents" Article 46: In the event of any civil liability disputes such as compensation for medical accidents, doctors and patients can resolve them through negotiation; if they are unwilling to negotiate or cannot reach an agreement, the parties may file a complaint with the health administrative department. To apply for mediation, you can also file a civil lawsuit directly with the People's Court.