There is not an agency that will help you remove it that I am aware of. You can try to remove it yourself or hire a pest management professional to remove it for you. Sometimes the best approach is just to avoid the area until winter when the hornets will abandon the nest naturally. You can read more about these kinds of nests and how to get remove them in this article from MSU Extension: https://www.canr.msu.edu/news/getting_rid_of_wasps_nests