Generally speaking, we are hands off when it comes to guild management. If you were dethroned, we will almost never get involved.
However, if your character is still in the guild and the person who dethroned you is no longer active, in very specific cases, we may be able to assist. I just want to set the expectation that it is generally a special exception.
The categories we have available for the Support Site usually are for more common issues. As this is not something our staff will usually becoming involved in, there isn’t a specific category. You’ll need to piggyback your issue into a different category, like the Not Listed Here one under Items and Mail.
You may be sent a generic template referring you to some self-help options initially, just reopen the ticket and a Game Master will look into your request as soon as they can. Remember to note your character in the guild that used to be guild leader and was dethroned as well as the current guild leader that you are trying to reclaim leadership from.