I had a similar issue today. It took me about 20 mins to download the game files and, once finished, I could no longer join any games - I got some java-error. I had to reinstall the client to fix it.

You could test if a VPN from another country would solve the issue.

Try this fix: https://forum.faforever.com/post/54399 If it does not work, then attach a client.log, please.