Maintenance for the week of September 30:
• PC/Mac: NA and EU megaservers for maintenance – September 30, 4:00AM EDT (8:00 UTC) - 8:00AM EDT (12:00 UTC)
• Xbox: NA and EU megaservers for patch maintenance – October 2, 6:00AM EDT (10:00 UTC) - 12:00PM EDT (16:00 UTC)
• PlayStation®: NA and EU megaservers for patch maintenance – October 2, 6:00AM EDT (10:00 UTC) - 12:00PM EDT (16:00 UTC)
Just in case you haven't found it, did you try the in-game group finder? It's far from perfect, but it has been reported to work for some people. The group finder is really the only option ZOS has provided for the purpose.