How do consumers complain about hotel fraud?

The law is objective:

Article 55 of the "Consumer Rights and Interests Protection Law of the People's Republic of China" If an operator engages in fraudulent behavior in providing goods or services, it shall be treated in accordance with consumer regulations. If the consumer requests increased compensation for the losses suffered, the amount of the increased compensation shall be three times the price of the consumer's purchase of goods or the cost of receiving services; if the amount of increased compensation is less than 500 yuan, the amount of increased compensation shall be 500 yuan. If the law provides otherwise, such provisions shall prevail. If an operator knows that the goods or services are defective but still provides them to consumers, causing death or serious damage to the health of consumers or other victims, the victims have the right to require the operator to comply with Articles 49 and 51 of this Law. Other laws provide for compensation for losses, and the right to demand punitive damages of less than twice the loss suffered.