Non-cooperation by co-owner

Hello,

I am living in a Apartment where water is leaking in a flow into my balcony from my top house balcony whenever they are pouring water.  I have requested them to set right the same but they showing reasons that they are also facing same problem from their top house.  I have told them to talk to their top co-owner and set right the same but they not acting upon it.  Can I take any legal or Law & Order action on them ?