Ex-exterminator here(hah) if you really want to take care of your wasp problem you have 2 options.
You can either
A) knock the nest down with a broom, they dont usually come after you because they are dazed and confused. But the problem is they can come back.
B) Buy a can of this and it will kill them instantly, but if you dont get them all in one shot it will piss of survivors and it will cause you to fight an epic battle of life and death as you try to spray them in midflight generally missing since their small and agile while you're trying to dodge their stingers.
https://www.amazon.com/dp/B0001LE2D4/ref=cm_sw_r_cp_apa_glt_fabc_KC9T7HJTE0K1QZJ84PV3
In case you ever have the issue again this is the stuff used in extermination it's like wasp kill on steroids
This?
BASF - 597802 - PT Wasp-Freeze II - Wasp and Hornet Insecticide, 17.5oz https://smile.amazon.com/dp/B0001LE2D4/ref=cm_sw_r_cp_api_glt_fabc_703P0AY4C1HX9A4ZMWK5