Water splashing down from upstair unit!
I left my condo apartment unattended for two days (April 9-10). When I came back home on April 11 around 12 AM, my whole bathroom was soaked with water and the water soaked through my bedroom's and hallway carpet. I called the Management office up, which was absolutely no help as the Manager told me they are only responsible for anything outside the units. I went upstair to tell the water damage of my unit, but the tenants seem not aware of any water leakage from their bathroom at all.
I used the steam vacuum to vacuum up to 10 buckets of detergent-like water. So I assumed that the leak was from their washing machine and splash it all down to my unit. I called the plumber up, he said that the leak may come from the pipe burst on top of ceiling since he cannot even get in the upstair unit. The only way to find out is to open my ceiling up to check. I called the landlord of the upstair unit (there's only two level in the building) The landlord told me that how can I prove/tell the water is coming from his upstair unit? First, the water damage is somehow not on the washing machine side (as my bathroom is same layout as the upstair unit). The water was leaking out from the ventiliation on top of the toilet. But ever since the upstair stopped the use of the washing machine (as I tell them what happened), there was no leak in my bathroom. So I am not sure what are the possible steps I could take...
Thanks for any advices!