Which department should I complain about SMS fraud?

The best way to deal with fraud is to call the police and let the relevant departments handle it. You can also complain to the network bad and spam report acceptance center. After being defrauded by the internet, it is possible to recover the money after reporting and filing the case, but the probability is very low, which requires the cooperation of the victims and the attention of relevant departments. Internet fraud cases are generally difficult to solve, it is inconvenient to investigate and collect evidence, and it takes a long time to solve the case, which is not conducive to recovering the victims' losses. As a victim, actively contacting the police and providing as much and detailed information as possible will help to catch criminals as soon as possible and recover losses. If the police don't make progress in a short time, don't be too anxious, wait patiently, learn a lesson, and don't be deceived again. Whether the cheated money can be refunded depends on whether the case can be detected and whether the criminal suspect's money has been squandered. If the case cannot be solved or the stolen money is squandered, it cannot be returned, otherwise it can be returned to the victim.

Legal basis: Article 266 of the Criminal Law of People's Republic of China (PRC) defrauds public or private property, and if the amount is relatively large, he shall be sentenced to fixed-term imprisonment of not more than three years, criminal detention or public surveillance, and shall also or only be fined; If the amount is huge or there are other serious circumstances, he shall be sentenced to fixed-term imprisonment of not less than three years but not more than ten years and shall also be fined; If the amount is especially huge or there are other especially serious circumstances, he shall be sentenced to fixed-term imprisonment of not less than 10 years or life imprisonment, and shall also be fined or confiscated. Where there are other provisions in this Law, such provisions shall prevail.