How to file a complaint against a company that keeps making harassing phone calls?

You can contact the operator of your mobile phone number to report, you can also report by phone to the 12321 Network Bad Network and Spam Report Acceptance Center, or follow its official Weibo and WeChat to report. According to the provisions of the Public Security Punishment Law, anyone who commits one of the following acts shall be detained for not more than five days or fined not more than 500 yuan; if the circumstances are more serious, he shall be detained for not less than five days but not more than 10 days, and may also be fined not more than 500 yuan: 1) Writing threatening letters or using other methods to threaten the personal safety of others; (2) Blatantly insulting others or fabricating facts to slander others; (3) Fabricating facts and making false accusations to frame others in an attempt to subject others to criminal prosecution or public security management penalties; (4) Threatening, insulting, beating or retaliating against witnesses and their close relatives; (5) Sending obscene, insulting, intimidating or other messages many times to interfere with the normal life of others; (6) Peeping, secretly filming, eavesdropping, Spreading other people's privacy.