I seriously get calls 5-6 times a week, nearly everyday, for the past 2 months. Saturday included. Called the number 206-866-1921 and told to call 866-544-4880 which states Special Olympics. My number is on the donotcall.gov. Told them to take number off. We'll see if they finally stop calling.
I receive calls every day from this number. I called (866) 544-4880 and the said they would remove my number from the call list. They were very polite about, hopefully this will stop the calls.
It wont as I asked them too. Please file a complaint against them especially if you are on the Do Not Call Registry. http://esupport.fcc.gov/complaints.htm