I moved out of a shared house half way through contract that stated I had to give them 30 days notice, billing me for contract

Hello, I lived in a fraternity house this last fall, but since my room mate stayed up until 3-5am every night I moved out, without telling anyone. The advisor of the fraternity just sent me a bill in February after moving out in January billing me for the remaining 2500$ for the spring semester for not telling them. I am obliged to pay this correct? I mean if your room mate stays up to ungodly hours and doesn't let you sleep and is inconsiderate this isn't an out right? Also a large downstairs window was broke for 2 months of winter and the temperature was like 40 degrees inside, and the bedroom window wasn't large enough to fit a person escaping so they had to fix that. They waited until the end of the school semester to do this. Are these reasons to back out also? Many thanks.