I have tried on 2 different PCs and on my Xbox none of them will allow it.

From the Microsoft account billing page I get the following message.

error
You have been redirected to this page as a security measure. Please contact customer support services.
Correlation ID: 27b6f811-b1fb-48e9-a25e-eb6c83fa8fd1
Session ID: 3af7e959-eb5c-4a46-8a43-a958585d0ffd

This is getting well beyond a joke now, I have been sent to talk to almost all your departments at some point, all leading back to Billing again, who I have just spoken too and they said they cant help because there is not phone support for "Hotmail or Live".

Since the 8th of August I have had this issue, over 14 days is unacceptable for a simple payment method issue.