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

Called number and someone answered, "Katie speaking" then I hung up.

i am getting call from this number so many times, asking a person, but he is not living in the same addres, i keep telling them but they dont care. keep calling from this number. i keep telling them take off my number  from you records but those MFs dont care, torturing us.

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