Platform? If PC, through Steam?

Okay, so PC then? Do you have your ticket number? If so, post that; perhaps @ZOS_BillE can take a look at some point. Now, other questions: has anything changed with your machine, your internet company and/or connection? And what error are you seeing when you can't connect?

I wasn't banned and cannot log in to PC EU at all since Greymoor dropped, so maybe it could be the same issue.

I didn't even bother sending a ticket in since I know the problem won't be resolved, and no error even displays (likely a database problem). I have seen that it's not just me...

ZOS really should take these issues and bugs seriously because if not, it can cause a huge disaster...

Ignoring a problem until it is catastrophic is exactly how you fall into financial ruin.

About the only other thing I can think of is if you have port forwarding done as set out on this page:

https://help.elderscrollsonline.com/app/answers/detail/a_id/1133/kw/port forwarding

If so, are you sure your router is still set up that way? My new router doesn't need that to happen, but boy the old one did.

Well, if you can post a ticket number that might help one of the reps to check things out.

Don't worry, it could be much worse, my Xbox EU account has now been completely stuck for 1 year and 3 months after 3 days. Seems these account destroying events happen after some bigger download, the Wrathstone absolutely demolished my account, after that it's all over, everything goes on just like usual, but only you simply just won't login anymore and your account is gone just like that. Think about the situation where you'd get this idea of suddenly deleting all your characters and giving all your stuff away, the result is quite the same as getting your account permastuck, would you do it?