Avtech Direct violates spam laws. Rip-off! Woodland Hills California

I have tried unsuccessfully to be removed from this company's email lists for many months. I never signed up to receive their "Staff Announcements" but I have been receiving them periodically for nearly a year. I have called their office on more than four occasions and ask to be removed. Each time they swear up and down that whatever went wrong last time will be ok next time. Instead of receiving fewer spams I have received many more (five in the last two months alone). I have complained to the spammer's ISP, but they keep using different consumer accounts, mostly with Comcast.

Here are the headers of the latest example:

From notice@computeradmin.org

Sun Oct 10 15:19:05 2004
Received: from washdc3-ar3-4-42-098-116.washdc3.dsl-verizon.net (washdc3-ar3-4-4
2-098-116.washdc3.dsl-verizon.net [4.42.98.116])by HIDDEN (8.12.11/8.12.10) with SMTP id i9ALIrFd018634;

Sun, 10 Oct 2004 15:18:55 -0600 (MDT)
Received: from xqw4v.zygmrt.net [177.116.136.112] by washdc3-ar3-4-42-098-116.wa
shdc3.dsl-verizon.net with ESMTP id 39613710; Sun, 10 Oct 2004 18:20:52 -0400
Message-ID:
From: "Administrator"
To: HIDDEN
Subject: ADV:

Staff Annoucement
Date: Sun, 10 Oct 04 18:20:52 GMT
X-Priority: 1
X-MSMail-Priority: High
X-Mailer: QUALCOMM Windows Eudora Version 5.1
MIME-Version: 1.0
Content-Type: multipart/alternative;

boundary=".F7CB34F.E.B0F5"

Ross
Round Rock, Texas
U.S.A.