This "non-profit" generally does not make calls themselves.
They use a Commercial Fundraiser to make collections.
This "non-profit" uses Community Support, Inc. and Empire Fundraising, LLC
Info is accessable from the secretary of state of Washington state, listed below.
If you wish the calls to stop, I suggest you both contact the Charity, and their Commercial Fundraisers.
Your local Attorney General's Office, Non-Profit/Charitable division will most likely be happy to help you with these annoying phone calls.
Considering it is that person's job.
Make sure you have the charity's full name, address, and phone number, and which Commercial Fundraiser's name when you contact the AG.