The maintenance was announced, though the downtime we currently see is not what we anticipated in that announcement.
I understand the frustration. We are working on getting everything back to normal as soon as possible.
A general note:
If you did not configure your domain to user our name servers, you will need to update the IP as the migrated servers has IPs. This also leads to the consequence that dns records has to be properly propagated for all domains, which in extreme cases can take as much as 48 hours.