How to convict mass harassment of SMS?

For harassing messages sent by others, if they interfere with normal life, you can call the police and ask the police to punish the harasser. The Law on Public Security Administration Punishment stipulates that anyone who repeatedly sends obscene, insulting, intimidating or other information and interferes with the normal life of others shall be detained for not more than five days or fined not more than 500 yuan; If the circumstances are serious, they shall be detained for not less than five days but not more than ten days, and may also be fined not more than 500 yuan.