That is fucking absurd. I rented a house with two guys in Oxford, at the end we left it how we found it and they tried to say we'd damaged loads of shit - it was retarded. It basically took us 4 months to get about 80-90% of our deposit back (about 1600 quid, because fucking lol Oxford.)
We got it back though. Fucking pricks. What do they expect really, people to just roll over and lose that kind of money?