Neville already had little faith in the force.What was it he used to call them ? Dad's Army ! How right he was. He must have had bags of past experience having been a magistrate.
Then as he thought SO little of their capabilities, IF he'd called them it would undoubtedly have been a 999 call, however, going along those lines you've laid out, it seems he probably didn't call them imagining Jeremy could handle things better.......................... IF he called him.