What happen to old characters?

Hi, im have been search for old molten all day, and i figure out that this is new molten.So i want to play again here, but i dont have my character, what happen with him, did all character have been deleted or is just mine?
im have this acc since 2011, i have spend alot of time playing here.Or at last just an instant 80 char, coz i dont want to levelup again, so damn boring.
Ty for you patience and time.

If the last time you played was more than a year ago, yes they are deleted.