Call Centre keeps calling at work after told not

Marilyn Frankis from Groenewald Lubbe keeps trying to call me at work. She keeps on calling our department switchboard and demands to speak to me. They have told her numerous times that she cannot speak to me and she keeps calling and calling after 5min again. They have even put the phone down when she calls but she is not stopping. She then sends me emails, that is not even professionally written with some words in caps and some not. Totally unprofessional. Today she called our switchboard 6 times and requested to speak to me. She was declined 6 times. If she calls again to our offices and request to speak to me, i will go to our local police station and lodge a complaint against Groenewald Lubbe and Marilyn Frankis. I suggest you take the legal steps properly and refer this to a court judge and stop harrassing people at work. She even theatened me in a email stating that a sheriff comes to my work. Really appaling attitude. This is the final warning for Groenewald Lubbe to follow the correct legal steps or i will lodge a complaint at the police station!. Do not contact me again. I already told you im not allowed personal calls at work!