Xbox live Rewards billing info stuck

Hello LoStPwNd,

After reviewing your account, it appears that you are currently being affected by a known database issue which is interfering with the information on your account. What is happening is that your billable account information is being incorrectly communicated
to our servers. Since this data is necessary to determine where to place your deposit, the process is aborted. Since this issue is currently being caused by a database not under our control, we have escalated the problem, and it is currently being worked
on by another team. At the current point in time, they have not yet provided us with an approximate solution date. To be clear, since this is an issue with how data is being sent from an internal source, adjusting your user information will likely not resolve
this issue. We apologize for the inconvenience, and ask for your patience while our other team works on a solution.

The link is dead. Another link?

And how to buy MSP and PC game in Xbox LIVE? Because I can't buy it due to got stuck at Billing Info.

Hello ThreeShotSolid,

We use your billing email for all Xbox Live Rewards communication. To change this address, you will have to change your billing email from your Microsoft Account (https://account.microsoft.com/profile/).
It will be under the "Edit your billing info" option.

Hello Djames4200,

We use the billing email for your account to send emails. You can change this information by going to the commerce page at (https://account.microsoft.com/), selecting "Edit your billing info", and then changing
your billing email from that screen. Also, we use Xbox 360 data for your gamerpic. If you would like to change this picture, you will have to do so from a 360 console. None of this would prevent you from earning Rewards. The "My Account" you are referring
to is likely for the Microsoft Rewards program, not Xbox Live Rewards.

Yep, that's right. How?

My Billing info region is stuck at UK, I can't edit it.