Contact them through their web page to ask to be put on their DNC list. http://www.key-research.com/contact.html
If that doesn't work, according to a user on 800 notes, the company's owner is Edward Ledek.
His linked in account is here: http://www.linkedin.com/pub/ed-ledek/5/68/aa5
Ed's Cell Number: 801-592-1943
Ed's Home Number: 801-225-8795
Ed's Home Address:
1021 W 1770 N
Orem, UT 84057-8614