Generally speaking, elected officials ignore messages coming through organizations. They also ignore form letters.
The best method is to go directly to your senator and representative's web site. It is simple, google your representative. example contact 1st district AZ congressman. The congressional site will come up. You fill in the blanks and send them a personal message.
The critical block which you should check is the one which says do you want a reply. Check it and when they do not reply send them another e mail.