Thanks to all for your input and suggestions.
Simon, I've just rang service provider again and am waiting for call back....that gives me some indication as to how seriously they are taking it.....like NOT...but will persist in trying to make someone hear me anyway.
Mulan, I asked my solicitors advice on obtaining an injunction/ non-molestation order...would cost me at least a grand...don't have that kind of money to throw at him.
As for the whistle.....may consider trying it. Initially I would pick up, hear his voice and place the phone in front of the TV and put on looney tunes. That made us all laugh about it but the joke is wearing thin now, I'm just annoyed at the fact that he can continue to do as he pleases and none of the powers that be are interested in assisting my family in maintaining some kind of normal life.
See if I can get somewhere today,
Bay64me
Nathan, I asked them to block him and although I have call barring to prevent those that withhold their number from getting through, they are not able to block individual numbers...so they say!