If you're a Church of Satan
member yourself, then you can be placed in contact with local members by writing administration. If not, then we can't help.
The only exception is if you are with a media outlet and wish to contact an Agent for representational purposes, though I get the impression you're looking for more friendly contact. The only way to get that is by being a member.
"The devil I'll bring you," answered Hagen. "I have enough to carry with my shield and breastplate; my helm is bright, the sword is in my hand, therefore I bring you naught."