Do what I know some people in my uni did, call them up and basically give them an ultimatum:
Come look for yourself and cross me off your list
or
Stop wasting my time and cross me off your list
Funnily enough they threatened to send someone round, but having to check roughly 500 rooms when most people are out and at uni is hardly a practical thing to do
Even people that had a TV for their games consoles were fine (I had a tv card for playing on my wii through my pc monitor and was told it was fine over the phone, quickly started recording the call and asked the kind lady to confirm it )