We have a yellow jacket nest in the corner of old farm house. See them hovering around wood trim, sprayed. It's up 2 stories. Gets worse. They are finding way into the house and I can't figure where. Killed around 6 a day last three days. Who would be the best to fix problem? Called a place called Bee Safe Service, but they didn't seem to know much. Said they would come out and spray, with 30 day guarantee, but never asked to see it first. Would cost $349. Any suggestions?