Help! Cant Log into chat on EUNE account..

Once I log in I cant log into chat for several weeks now on this EUNE account while my EUW account works fine. I have no chat restrictions and have tried several solutions i found online like resetting password, /flushdns in cmd, repairing the client, deleting the account preferences file, reinstalling the game but nothing worked. I've had login issues in the past and they seemed to come and go randomly but this one seems to be unrelenting. Please help!
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