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Nevermind.

It actually did work. I just wish I knew what it said.

Solution:
Just entered the desired password.

Then Logged into PSO2 with the new password

Then received Mail with an...

Everything was in japanese until I got the reset confirmation email.

Following the link its pure gibberish and I don't know what it wants from me.

mF??A?xA?[AhX??B
*A?[AhX

Is all it says.