Just turned my mobile on about 5 mins, and how weird it started to ring, I looked at the number (which is this one in question) so I answered it and no-one was there, no noise in background, or no noise from the caller. Been gettin these annoyin calls for the past 3 months now, in the end I will have to tell them to "f**k off" so they get the picture! Best way really!
Its not so simple to ignore them cause I have done so, and they keep on calling!