It says that my D2 account is permanently logged in into my game center

[Rehan_2]

"Your coc account is permanently loged in into your game center"(something like that)

 

[hang-the-9]

Contact Blizzard support. Why can't you just select "log off"? Are you talking about the Blizzard Launcher here? You may want to provide a bit of details here about what you are doing exactly.