It looks like Facebook Messenger has problems with logging in, connecting to the server, and receiving messages in parts of Europe and the USA. If you’re one of those affected, all you can do is wait.
In the meantime, try force closing the app, restarting your iPhone, and removing and reinstalling the app. If it doesn’t help, it won’t hurt.
I. Can’t. Log. In! And Messenger says I have to confirm my ID with Facebook first! [emoji51][emoji51][emoji51][emoji51][emoji51]
Did you try logging in via browser, or do you use the apps?
There’s no way to contact them directly. Use the Help Center Help Center to report the problem with your account.
This might help as well:
Help Center
I’ve found this, hopefully it will help:
Report a Login Issue