Lost password recovery not working

I’m trying to re-instate on of my accounts before they close them down for lack of use. I’m going through the website recover password, but it says my user ID is not valid. Now I know it is because it’s still in my log in screen and my character belongs to a guild. So who do I need to see to get it sorted.
Many thanks.

Only way i know would be through DQ&I on SO website, good luck