The only time I've personally had a big publisher title get fixed after contacting someone about it was when I tracked down an email for the editor in charge of the imprint the book was published under. The regular CS email brings no response in my limited experience. In some cases emailing the author (who can in turn get in touch with their editor) might work better than contacting the publishers CS people.
Don't know how up to date these are anymore, but you can find some publisher contact emails here...
US Pubs -
http://everyonewhosanyone.com/edus1.html
UK Pubs -
http://everyonewhosanyone.com/eduk.html