Problem with payment account blocked

Sorry to hear about this billing issue. I would suggest contacting Xbox Billing Support at 1-800-4-MYXBOX. The support professionals there will be able to access the account and determine what if anything is blocking your account from adding cards. They
should also be able to add a card for you, should the issue persist.

I hope that this will help you out, and we see you back in matchmaking soon!

They are the only ones that CAN help you. It's a payment problem and there is a block on your account. We won't be able to help you out here.

The problem you have is that it isn't your account....and it would need the account holder to request the payments be stopped or to remove the card. The only options you have are either convince your ex to remove the card (which sounds like they won't) or get your bank to block the payments.

To add, I get this message when trying to purchase:

Check your account
The payment option on an existing subscription has been declined and is blocking this purchase. On your Xbox, go to Settings. Or go to account.microsoft.com/services to fix this problem.
Check your account The payment option on an existing subscription has been declined and is blocking this purchase. On your Xbox, go to Settings. Or go to account.microsoft.com/services to fix this problem.

K+tWBN0IOUSVAKoH.0.0.22.12
2020/01/31 - 17:13:17 UTC

Hi,

Have you called Barclays over the phone? I've not heard of Barclays blocking payments from Microsoft. I don't have a Barclays account, but I have purchased things with my Barclaycard (Credit Card) several times without issues.

If you have the Barclays mobile app, be sure you haven't blocked internet payments on your debit card.

Have you ever called them before to block a payment for Microsoft? If you had there maybe a fraud marker against your account. Either way, it's something you're going to need to take up with the bank, Microsoft won't be blocking the payment.