Neighbour denies tree root damage to driveway and fence, calls police on me for confronting him

>be me
>Mia, 34, homeowner in suburban Melbourne
>nice quiet street, good neighbours for years
>notice fresh cracks in my driveway one morning
>bigass tree root from Gary's yard pushing up the concrete
>take photos from every angle
>text Gary: "Hey, can we talk about the root from your tree?"
>he replies: "What root? Your driveway was always cracked."
>I know it wasn't
>I have photos from last year when I resealed it
>decide to confront him in person
>walk over, show him the photos on my phone
>he squints, shakes his head
>"Never happened. You're imagining things."
>I point at the root visibly lifting the concrete
>he says I'm harassing him
>pulls out his phone and calls the cops
>I stand there, stunned
>police arrive, ask what's going on
>Gary says I'm trespassing and making false claims
>I show the officer my photos
>he says it's a civil matter, suggests mediation
>they leave
>I'm fuming
>next day, Janet, Gary's wife, knocks on my door
>she looks nervous
>she says she saw the root too, when Gary was pruning last month
>I ask if she'll back me up
>she says she can't, Gary would lose it
>then she goes silent
>doesn't wave when I walk the dog
>ignores me at the mailbox
>it's been three weeks
>I'm done being gaslit
>file a complaint with the local council
>send Gary a letter of demand with the photos and a $4k quote for driveway repair
>two weeks later, I get a letter from council
>Gary reported me for an illegal fence extension
>the fence is exactly where it was when I bought the place
>now we're both in mediation at the community justice centre
>I have a folder of evidence
>he has nothing but denials
>the mediator looks at us
>Gary says I'm the unreasonable one
>Janet is in the waiting room, won't meet my eyes
>am I in the wrong here