Uninsured being sued by citizens ins. For water damage to condo below mine.

A washing machine wqter line broke and leaked water onto the lanai below from mine above. Citizens is asking me to pay the almost $10,000 damage to basically dry their lanai and one room.they even want the $500 deductible they collected from the insured. They sent me photos and bill from servepro. Servepro sent three trucks and 5 men. I was there and saw everyone standing around except for one guy. It was extreme overkill. I went into the condo and saw all dry rooms, baseboards in one room pulled and a hose leading to the ground outside...anyway, what are my options.......what should I do first? What can I expect? Thank you....Gail