Just go to your nearest approproate store and get some insectiside spray or powder and get them in the evening or night when they are least active.
When I was younger, I mowed lawns to make some money. I came across these bastards in one of the lawns I mowed. I instantly thought, “hey, I will just set the mower on top of their hole in the ground for a while and kill them with the mightly blade”. What happened is most were sucked into the grass bag and a few got out. I was stung 4 times, so not too bad. (My dad was a bee keeper so getting stung was pretty common, as I would always be messing with the bees).