It is not part of a CO's job to update applicants (or their lawyers) about processing. You, or your lawyer, won't get a social/business polite relationship with the CO ("Dear Mr X, Thank you for your email and I am dealing with the content...") since doing that for everything received would take up time that is supposed to be spent on processing cases and moving them towards the moment when a visa can be issued.
So in this case, it's not unusual that your lawyer didn't get a reply, but some action happened as a result of his/her email.