Hi Pumkun,

I received the exact same email today. I just got off the phone (well about half an hour ago) to Square Enix EU support and they gave me a new code to apply to my 1.0 service account. I did ask for instructions on how to apply the code and they said they will include instructions in the email. I've just received my code, but no instructions on how to apply it to my 1.0 account, so I'm stuck at the moment.

Don't give up with this response from them though, a phone call or live chat conversation should sort it out for you!