Maintenance for the week of July 6:
• PC/Mac: No maintenance – July 6
• ESO Store and Account System for maintenance – July 8, 10:00AM EDT (14:00 UTC) - 12:00PM EDT (16:00 UTC)
Good luck. If I remember past cases, you will have to try to work with Customer Support to take over the guild. That will not be an easy process. It might be easier to simply start a new guild and woo over the people from the old guild.