当消费权益被侵犯，该找哪些部门或平台解决？

Core Viewpoint - The article provides a comprehensive guide on various consumer complaint channels available in China, emphasizing the importance of knowing where to report issues related to product quality, service commitments, and after-sales support [1][8]. Group 1: Official Administrative Complaint Channels - The 12315 platform is highlighted as the most authoritative and core consumer complaint channel, integrating multiple complaint hotlines and allowing submissions via various methods such as website, mobile app, and phone [2][9]. - Complaints submitted through the 12315 platform are processed by local market supervision departments, making it suitable for issues related to product quality, price fraud, and false advertising [2][9]. Group 2: Third-Party Social Supervision Platforms - Internet platforms like "Black Cat Complaints" serve as important third-party channels for consumer complaints, offering quick responses and leveraging public opinion to resolve issues [3][10]. - These platforms are characterized by easy access, transparency in processing, and the ability to aggregate similar complaints to enhance visibility [5][18]. Group 3: Recommendations for Different Consumption Scenarios - For online shopping disputes, consumers are advised to first contact the official customer service of the shopping platform, and if unsatisfactory, escalate to the 12315 platform or use third-party platforms for issues like false advertising [13]. - In local service disputes (e.g., food delivery, home services), complaints should be directed to both the service platform and the local 12315, especially for safety or health-related issues [13][19]. - For large pre-paid expenses (e.g., education, fitness), it is recommended to use multiple channels simultaneously, including 12315 and third-party platforms, to maintain pressure on non-compliant businesses [19]. Group 4: Industry-Specific Complaint Channels - Specific regulatory bodies exist for various industries, such as the Ministry of Industry and Information Technology for telecommunications, and the China Banking and Insurance Regulatory Commission for financial services [4][12]. - Consumers can report issues to dedicated platforms for transportation services, cultural tourism, and other sectors, ensuring targeted complaint handling [4][12]. Group 5: Preparation and Usage Tips for Complaints - Effective complaint preparation includes gathering evidence, clearly stating demands, and maintaining records of the complaint process [11][20]. - Consumers are encouraged to combine official and third-party channels while being mindful of avoiding duplicate complaints to conserve resources [15][20]. - Patience is advised as processing times vary, with official channels typically taking 7-15 working days [20].