They have been calling 3-4 times a day for well over a month, never leave a message, but its always at a different time.
I have finally got fed up with them, and i called the number back and got a recording. they gave me the option in the recording for more information, and then gave me the option to be removed from their calling list. the only downside is that it will take up to 30 days to remove me, in which they can still call me.... i guess I can live with it, as long as the calls really do stop.