They kept my entire security deposit, need help!!!?

Ok, so I was renting from a private owner, we lived in one of his apartments for a year and at the end of the lease we told him we were moving because he we needed more room (it was 4 people sharing a 3 bed) and our neighbors sucked, he told us we were such good tenant he hated to see us go and he had a house for rent (woo hoo a 5 bedroom 2 bath for the same price with a backyard) so we jumped on the offer and moved in. We never did a final walk thru at the apartment and the $1200 security deposit just rolled over to the house (first mistake), we never did an initial walk thru of the house (second mistake.) The house was filthy on arrival, a ton of repairs had just been and there was dust and supplies, dirt wood/paint chipping, the city even delayed our move in because the house wasnt up to code yet! Anyway 1 week before our lease was up, our landlord hired a property management company, they did the final walk thru with us and kept our entire deposit. All they sent us " Cleaning Charges: $771.98 Painting Charges: $303.02 Mini Blind Replacement: $125.00. WTF we left this house in better condition than we got it in, why was the entire house painted? We were there was 12 months and the walls were painted new when we move in, and how on earth do they come up 771 in cleaning? What are my options here, we are in california. Any help would be great!