I know that some guests are overly picky, and some are looking for a reason to get a refund, but after multiple people mention how dusty the place is, why not, I dunno, just. dust. it. And it is totally inappropriate for the host to still be using the private room during anyone's stay. When I read things like this it makes me so angry that anyone ever gave us anything less than 5 star rating, LOL.
As far as getting a response from airbnb, I honestly don't have a clue. I usually always start with the message system, now that @Huma0 directed me how to find it again on the new improved super confusing interface, so there is a written record of whatever the issue is, and then move on to a phone call, I've never tried them on twitter or FB