This FOP organization, assuming it's them, uses several phone numbers, 775-401-6006, 775-200-1496, and this one, so far.  I agree with what others are advising, contact your local chapter and donate to them.  We decided a while back that we will donate to charities that strike a cord with us, but only locally when available.  And we never pledge over the phone.  A fellow from a different organization actually argued with me to try to convince me that I was wrong in my convictions.  After debating the issue, he abruptly hung up on me.  So I called the number he called from and left a message describing his actions and to take us off their calling list.  We shall see.