Just bought and installed a Digitone 10 call blocker. Can block any number within an area code. I block 800, 855, 866, 877 and 888 numbers. Phone no longer rings. It answers then hangs up and suppresses the ring you never hear it. It's awesome. Spent about $100 but worth it. Google it. It arrived at my house in three days.
They call all day!! never leave a message and when i actually answer the phone...THEY HANG UP!!!! what is the point of this?!?!?!
I even called the number back and got a recording for the "promotions department" left a msg to remove me from their list... since then i've gotten more calls. REDICULOUS!!!!