If you're getting harassing phone calls, you can probably call the cops and tell them that the voice is threatening you or something. :/
I was getting calls from 00-000-0000 for a while. It was a really bad recording telling me that I won a trip to Cuba or something. A lot of people I know were getting them, too. It turns out what happened was this: Canada introduced a national do-not-call list which pretty much everyone signed up for. Then telemarketers took the list and used it as a list of valid phone numbers to call by blocking their number.
