This sort of problem does need to be reported to a FH staff member so they can deal with the problem properly, but if you are trying to find someone then try to click on the "members' tab that is found beside "My Messages" and "Logout" from there you can use the search bar on the right hand side with the magnifying glass right next to it. From there try to type in the name and see what pops us. Also, google itself is a good search engin as well. You can perhaps type in the name and see what does pop up. You can perhaps search [name/Username] Feral Heart in google and see if that helps.
Good luck with this though, Like Buffy has said above make sure you provide staff with the proper information so they can further help you out