No one on this site can stop someone from calling you. That's not what this site is for. It is for reporting such abuses'. Are those your home/cell numbers that you've posted? This is a public forum & scammers do read here (& post SHILL messages). Contact admin (bottom of the page) to have your personal numbers removed.
It's the American Red Cross looking for blood donations. They called me today at 12:00 p.m. I used to be pretty good about giving blood & they would start calling me incessantly when it came about time for me to be able to donate again. Last summer, I answered the phone when they called and told them that I was training for a marathon and would not be able to give blood until January 2013. The woman I spoke with thanked me for letting her know and put me on some kind of list. They did not call me again until today. So maybe if you answer the phone and tell them that you can't donate, or that you're scheduled to donate somewhere already, they will leave you alone. Just a thought.
Just got 2 calls from this number- one on my office phone and 15 seconds later on my cell phone. Glad someone previously said it was the Red Cross. I have retired from donating after 5 gallons.