The exact same thing with us as well - the calls comes in almost every day. Once I did answer the call, and told them I did not want to be bothered - not use. The calls are still going on.
We keep receiving calls on this almost daily and at all different times of the day. We do not recognize the caller so we let it go to the answering machine. They never leave a message but we do get a noise that sounds like road noise on our machine.
The exact same thing with us as well - the calls comes in almost every day. Once I did answer the call, and told them I did not want to be bothered - not use. The calls are still going on.