This is a call organization (they have a variety of numbers all starting with 617-591-62XX) that makes calls for a variety of non-profits. If you call one of these numbers, you can choose a "do not call" option from an automated voice system.
I also received multiple calls from this company , and they hang up as soon as I tell them I am not interested. I filed reports to the Better Business Bureau and the Do Not Call Registry
I finally found this website you can go to :
http://www.sharegroup.com/contact.shtml
Call this number to speak to a live person. 202.315.5300, and ask to be removed. The woman , Connie Finn, told me that I will be removed tonight.