Your land your space there you are the godfather's grandaddy...I dont think you guys quite understand the level of arrogant with these guys. A week ago I spoke to a guy called 'Kaai', an area manager of Frogfoot and he is still coming round to my place.
When I discussed the matter with a guy from EdgeFibre while they were busy with the box on my property, he was talking to me like I was something the cat dragged in; and was still shouting out the window as he was driving away about how guys like me just make life difficult for them.
They apparently have some agreement with council which allows them to act like the godfather...
Dig nice and deep all along your boundary line. Prep a bed for plants. If you cut their cable = not your problem. They must relocate.