My ID is not being accepted.

Help!! Pllleeassee!

So Friday night I attempted to log into FF and had the error message 'ID or Password is incorrect'.
Tried a few times and found myself locked out. I changed my password when I was finally allowed to try again and attempted to log in again, still the same message.
I kept trying for another 30 minutes before giving up and calling it a night.
Saturday morning I started fresh and tried to log in.
Before trying though, I pre-empted any issues and reset the password and logged into my mogstation to ensure I was using the correct ID.....which I am.
It's still coming up with the same message.

Any advice/guidance?

NOTE - from other advice I've received to try and resolve the problem:-

- The SE ID on mogstation is the same as the one I am attempting to log in with.

- I do have the one time password app activated. I have attempted to log in with attempts using and NOT using the one time password at the game log in screen.

- I have ensured the ID and password are entered with the correct upper & lower case letters.

Most Frustrating :(

Good morning and thank you for posting in the Final Fantasy XIV Technical Forums,

Unfortunately, we are unable to assist with the issue you are describing in the Technical Support Forum. As a support ticket has been created, this thread will be moved to ‘Support Center Ticket Created’.

Good luck with your adventures through Eorzea!