Get the digitione blocker. You can block all calls, except who you want to hear from. It also allows you to block up to 80 numbers and/or AREA CODES. I love the thing and wish I had gotten it earlier. The phone companies blocking service sucks. But do you really expect them to prevent the very thing that makes them money - calls. DIY. THey can call all day - my phone doesn't even ring, they get hung up on.
Its First Financial Bank collection dept, from one of the 50 numbers they use to hide who is actually calling, this one is North Carolina, others are Texas, Florida, Ohio, or just Number.
They called my house constantly for years. Finally I got fed up and yelled into the receiver, "DON'T CALL HERE ANYMORE!" and immediately hung up. The phone hasn't rung since. It's been a month. I hadn't realized it was that easy! The statute of limitations has run out. If we complain to the authorities, First Financial KNOWS it doesn't have a leg to stand on. Do this and don't engage them with any other conversation. Just tell them to get lost!