buy the hornet and wasp spray in the can that foams.. it will shoot like 10-20 feet or more and the foam grows like crazy and covers the nest and kills everything do it late at night or real early in the morning while they are dormant and all in the nest
if you are allergic you may just want to have a professional do it or call a local bee hive farmer they usually will pick them up for free and add them to the collection they have