Some collection agency

Stop calling

It's a collection agency called Global International.  
They have a website for consumers that are getting called:
http://www.globalcollection.net/Consumers.aspx

this number is showing up repeatedly on my VoiP statement - no clue who it is. what i see is that they are using my VoiP phone number and dialing to an out of the country phone number... !! it appears they are using roll over numbers too.here is a copy from my statement:03/03/08       11:00 PM GMT       (905) 413-8799       +12121110013       1 min03/10/08       3:18 PM GMT       (905) 413-8770       +12121110013       1 min

They call me 5 or 6 times a day and don't leave a message.  Very annoying.