Re Water damage in same area

[Viney Khera]

Hello, 

I have a 2 storey house where rooms are rented to different tenants, in shared bathroom on 2nd floor, there was toilet overflow issue which caused water leak in downstairs bedroom. I gave work to Water damage restoration company, which was working on it and had left their fans and dehumidifier running for arnd a week in bathroom and also in downstairs room. Downstairs room tenant was out living in hotel for last 4-5 days as noise of these machines is too much. 

He came back and today noticed more water damage on downstairs room ceiling ( almost triple size of visible orignal water spots damage in downstairs ceiling), after checking bathroom upstairs he noticed it was dripping from hose of one of machines running in bathroom. Hose end point was supposed to be set and drain in sink, but he found hose lying on floor from where tiles were removed. Someone moved it or it fell off or person from their company who came to change or take fan missed it or if any tenant made mistake, no one knows or will tell. 

I want to know, who is liable for this loss? Is this water damage restoration company mistake, will they take responisbility and pay for damages? I will be talking to them tomorrow, i reached out today after finding late in afternoon but didnt hear back from them, due to Memorial day holiday.

Please let me know how shall i approach this issue? Already paying high deductible for current insurance claim. Not sure, if inurance will consider it in same claim or not? Even if they do, how will this additional damage will affect my insurance renewal next year? 

Thanks in advance!