I get them all the time too...at least 2-3 calls a day from differnt numbers and different States. If I see a number come up on my phone that isn't in my contact book, I don't answer it....if they leave a voicemail, then I MAY call them back in warranted...otherwise, I just ignore it.
After reading other comments, and finding this number linked to Western Sky, I went to their website and called them direct.
They will have to transfer you to another company that they now own, and you can tell them to remove your number from the call list. Don't know if this will really work, but it's worth a try.
I also threatened them with the fact I have this number (and thanks to another post here) several other numbers they use as well as Western Sky's number, and turn them into Indiana's attorney generals office because both my cell number & land line number are on the states do not call list.