To cease the madness partially, list the number in your cell's directory and give it a no ring ring tone from your phone's ring tone offerings. Good luck to you...
Received call from this number this afternoon. Since I was in front of my PC, I Googled the number before answering. Glad I did! I let it go to VM and they left no message. Funny if it's a credit card company, as I refuse to own one.