It’s not a hedge cutting dispute between neighbours - it’s not a shared hedge. . Don’t listen to those minimising his behaviour. As someone once said ‘When someone shows you who they are, believe them the first time’. He did this deliberately, had to go and fetch the cutters - not just a spontaneous kicking of the hedge for example.
Without going into all the details, when I had to report a neighbour for exhibiting over the top angry behaviour which involved shouting at my dd and chasing her down the road and hammering on my front door and screaming, I used the online form. Two police women officers came round a few days later. They took it very seriously, said acting early prevented escalation, took my age into account, were interested in the fact he was a renter ( said they would inform landlord) and then a police officer visited the neighbour a few days later to ‘have a word’. Two years later, no more trouble ever.