Landlord Inaction

Hi Although not quite strata or flat related I have an issue i would like some advice on relating to a rental property.

Background:

Rental property, house and land, behind our residence. No agent involved and tenants rent directly from owner.

Problem: Recurrent issues with long loud and intrusive parties. Has been going on for years. Council compliance officers attended and police multiple times. We have erected a 2.1 metre fence at our expense and with council approval to maintain privacy but partiers now get on roof of dwelling to party. As they get drunker their behavior diminishes to the point of loud and offensive language, they enter our property without permission by climbing over the fence, they throw rubbish into our yard, they urinate publicly (even from the roof).

The council seem unable to help any more. when the police come they deny the actions and shut down for a short time and then start up. I challenged them last Australia day and was harassed because of it. It is VERY intimidating to have thirty or forty extremely drunk adults invading our privacy and our home.

The landlord , who has been made aware of the issues, is completely inactive as he has many rental streams coming in through the house. (Is there a limit to the number of occupants?)

The council suggest community Justice. I don’t think that will help. Short of filming the episodes and having them arrested what can i do? Surely the landlord must have responsibility in this as i am sure if an gaent was managing the property they would have been evicted years ago.

thanks for your help!

Rob