According to Article 266 of the Criminal Law, the crime of fraud refers to the act of defrauding a large amount of public or private property by fabricating facts or concealing the truth for the purpose of illegal possession.
According to the Interpretation of the Supreme People's Court on Several Issues Concerning the Specific Application of Laws in the Trial of Fraud Cases, individuals who defraud public or private property of more than 2,000 yuan belong to a "large amount"; Individuals who defraud public or private property of more than 30,000 yuan belong to a "huge amount".
But it also stipulates that,
The higher people's courts of all provinces, autonomous regions and municipalities directly under the Central Government may, according to the economic development of the region and the social security situation, determine the "large amount" and "huge amount" of individual fraud and unit fraud in the region within the range of "2,000 to 4,000 yuan" and "30,000 to 50,000 yuan" respectively, investigate the criminal responsibility of the relevant personnel, and refer to the amount stipulated in Article 4 to determine the application of the original criminal law.
So you can combine the specific regulations of your province to see if you have reached the level of fraud. Usually, when you arrive, you have to file a case. The object of the report can be the public security organ, the network supervision organ or the shopping website.