complaint about the Washington Post delivery service

From a 1st Street NW resident:

Is there anyone in the neighborhood who works for the Washington Post? I know awhile back someone responded to the listserve and stated they worked for the Post and was interested in concerns about the Post.

I am so frustrated with my delivery service and lack of responsiveness after numerous complaints to customer service about repeated issues. I have also asked for responses in writing regarding my complaints, that request was ignored. Might someone have the name of person(s) at the Washington Post with whom I can register a detailed complaint -- outside of those who answer the 334-6100 number?