The phone number is 416, they leave messages
Complaint
NICK
Country: United States
The number calls about once a month, I'm sure it's a debt collector but I could be wrong. They just leave a message saying "please contact us immediately about a certain issue. If not, we will take action and it will affect you negatively".
Comments
http://en.wikipedia.org/wiki/Area_codes_416_and_647
For that matter, what good is a message to contact them that doesn't even provide a contact number?
If it is a debt collector, it is illegal for them to make abusing or harassing calls, or to cause a phone to ring for purposes of harassment. Violation of FDCPA, but you would want to document high levels of calls over an extended period, to establish intentional harassment, negligence, or similar.
If they ever actually identify themselves, you want a paper trail of their harassment. At this point, you have a series of harassing, anonymous nuisance calls containing veiled threats.
Use of vailed threats matches not only debt collectors, but also some criminal phony "debt collector" gangs known to attempt to extort people over the phone.
Report it as a series of harassing calls, to your local police and phone company, so that you have documentation (copy of police report) for when they started, and the harassing nature of the calls. You might ask your phone company if they can put a "trap" on the line, to log the time and any number information from their side, next time they call. Although you might not have direct access to that, you can turn it over to law enforcement, or obtain it through subpoena.