Calls everyday for the last week, will not leave message. Caller ID says Frisco, Texas

calls, but no message

10Apr2011noon PST
This is the first time I got a call from this number.  The caller ID said "Texas" 972-624-6001.  
A little checking on the internet showed that it was 24 Hour Locksmith in Frisco, Texas.
I get other similar calls indicating "Pennyslvania," "Utah," and so forth.  These calls are apparently
spoofed by some telephone hacker or other unscrupulous person or group for no clear reason, other than perhaps the same reason some people write graffit on road signs or rail cars...However, maybe some of you more enterprising folks with a website business might consider doing it to get people to look you up on the web on sites like this.  It could inspire guys like me to take the next step and look at your website.

Caller called me by name and said he represented "The Children's Wish Network" and thanked me for past donations. I told him no, I could not participate.  He thanked me and hung up.

This is the fourth time in a week this number has called. Some times the caller ID shows Texas, other times it shows 24Hour Locksmith. I've told Children's Wish Network to stop calling dozens of times, yet they keep calling.