We are currently investigating issues some players are having on the megaservers. We will update as new information becomes available.
We are currently investigating issues some players are having with the ESO Store and Account System. We will update as new information becomes available.
I thought my account had gotten hacked. All my guilds and friends were gone. Then, I logged out... logged back on... logged out again... and finally they showed up. Logged in a new character, now they're gone again.
Same thing was happening after one of the earlier big patches a couple of months ago (February I think?). Don't worry, they are still there, they just take a long time to load. Presumably the server potatoes are overloaded.