Neighbour just dumped bleach water onto my cat, furniture and clothes

They were cleaning or something and dumped a whole bucket of bleach and water off their balcony and directly onto mine, covering my cat and all my furniture and clothes in chemicals.

I told them to stop the first time and then not 3 minutes later they dumped another bucket of chemicals on the other side landing on my cat grass which is now unsafe to eat.

Idk what I can do about it other than yell at them which I did... When I knocked on their door they didn't open it. What a surprise.

Update: Washed cat and filed a police report

Update 2: I knocked on their door again a bunch but they ignoring me... They definately were home. So I called the guys dad and his dad sounded angry and said he would call the son/Tennant straight away. I then cancelled the police report because my cat was healthy and fine after a bath, and no serious property damage was done- plus I felt like a scolding from your dad when you are a grown ass man should be enough. Also I don't really like getting police involved in stuff unless nessisary.