From myexpierence, negative... You are not able to get this done from any phone carrier that I am aware of.
From my Work standpoint: The only options you really have are :
1) Change your phone number
2) Use the Silent Ringtone
3) Ignore them and hope they go away sometime soon
I do appoligize for this, its a PITA (Pain in the a$$) but its very hard to do something unless they are making specific threats.
On the other hand, if you want some assistance, or other recomendations, PM Me, and I can try to help with other things! LOL:flamemad: