Nothing could be simpler, just go to the "My account" tab and click on "My data".
You can enter a new address or edit the existing address. When you have completed the form for a new address, click on "Save address" to confirm your entry.
If you have forgotten your password, you can request a new one.
If you do not receive a new password, please check your e-mail box or SPAM folder again. Otherwise, we will be happy to help you at 0848 11 11 48 or at: firstname.lastname@example.org.