I used to work there. You have to tell them permanently remove you and not put it out and if you call me again I will report it. The calls ARE recorded, so you record it and tell them you are. Then if they call you say you will call and file a complaint then that should work.
Kept getting these calls and never answered. While I like to donate blood, I moved to Colorado which has no Red Cross. I did my research. So, after getting 5 calls within a week, I decided that was enough. Just tell them you live in Colorado permanently, then maybe they'll stop. :)