Hey @Crona49,
dont worry, your Blue data is not deleted.
The Blue and Red server were merged into one server and is called Silver now. The Yellow server stay´s alone but is called Gold from now on.
However, to be able to play on the Silver server (which contains your Blue data) and continue your game, you have to merge your Red and Blue account profiles. For that, take a look at our merge FAQ. In case you should have any problems, take a look at our merge issue FAQ.
I will lock this topic now as the issue should be solved with this answer. :)
Kind regards Xylos