What should a student named Beijing Shengde Education do if he always uses his landline to make harassing calls to promote product courses?

Hello, call the police. I've been harassed like this. I called the police and said that my life was harassed and my information was leaked. At present, my heart has been seriously hurt. I will continue to be harassed in a few days, and I will call the police again. In a few days, nothing will happen. I haven't received a phone call that harassed me at that time for over a year.