This is what I would do....

... arm myself with a good supply of industrial strong flashlights. Even a light suit, with build in lights. And a bit of armor so they cannot poke me too easily...

A good strong baseball bat, and go to town playing cricket on their arses.

After good few hours of fun, and they are all escaped back to their cosy little hole..

... I would start by throwing lightbombs down the hole, perhaps a handful of ducktatped flashlights (no easy way to turn them off)... just play with those fuckers. Hear them scream and beg for mercy... And then finish it off by pouring down gasoline and lit it up. You know, good clean family entertainment.

After while, tell them I am sorry and that I have childrens teeth for them (perhaps I would make a deal with a local dentist, and throw them a little... give them hope, and get them to climb back up again) and as they start climbing ... fill it with concrete while I yell; how do you like them apples, motherfucxers.... dump a few truck down that hole.... keep it coming.

Arhhh, that would be a good day.