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

Someone from this number has been repeatedly calling my daughter's phone the past several weeks asking for a Christine.  It's getting old.

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