I was looking for short term accommodation and posted an ad on Gumtree. I got a response and went for an inspection.I liked the place and told the owner I would move in and would pay the deposit the next day. But I decided against it the next day and informed the owner within 24 hours that I wouldn't move in. He is now demanding that I pay the deposit or one week rent or I will be reported to VCAT. Is that possible? He says since I agreed to pay on SMS it is legally binding.