I finally made it to the game.
Inititally i was in Crystarium.
I got dced 4 times in a row after loading screen.
5th time I somehow could teleport to Limsa Lominsa.
In Limsa Lominsa I got dced every 5 seconds after loading screen.
After 7 tries step by step I got to Middle La Noscea and now I can at least play in dungeons.
But it's stupid. I've bought expansion and I can't play it.