National Do Not Call Registry, register with them, free, and only takes a few minutes. They will deal with them. It really did work for me,and I quite enjoy making trouble for those who make trouble for me.
I am sick and tired of you guys calling me. Every time you call me you always use a message so that I cannot personally tell you to not call me. If you ever call me again I mean ever I will sue the pants off of you so make sure no phone calls ever come to my number again.