Update 10:15 am EDT: The maintenance is over. All functions of the account center are available again.
Greetings,
We will bring down the Account Center for a short maintenance tomorrow, Thursday March 15th, at 9am EDT (14:00 CET). During the maintenance you will not be able to change subscription or redeem game codes.
At the moment we anticipate the Account Center to be back online at 11:45am EDT (16:45 CET).
Thank you for your understanding.