The message says that everything is over, the protection is lifted.

But before this message, the player has more than a month.

After these messages, the elves come to me in about a week and wipe me out.

What are they waiting for? Father Faidaen has arrived, now they can launch a counter-offensive.

How can I save the dragons? I haven't even reached them once.

Scout the area, level up heroes, build up the army - in general, do the same as always, Pinky. Try to conquer the world. Hire any hero in the tavern and let him run ahead, reveal the fog of war on the map, and look for optimal routes. So that you can quickly stop Robin from running to the dragons before he exterminates them.

they still won't join

And they shouldn't. Messages #8 and #9 are about that.