BILLING ADDRESS POST CODE ?????

Hi there! I'll do my best to help.

To confirm, are you currently residing in Malta? Please note that Xbox services are only available to supported countries/regions based on the link below:
https://www.xbox.com/en-US/regions

Though, you may still be able to add a valid payment instrument to your Microsoft account by going to https://account.microsoft.com > Payment & billing > Payment options.

Best regards,

Hey there bud!



Okay, the error code you are encountering 8C15000C means that you have entered an incorrect billing address, Zip Code, or postal code that doesn’t match the billing address or code
used by your credit card company. Be certain you’ve entered the billing address and Zip Code or postal code for your Xbox LIVE or Zune account that matches the billing address and code used by your credit card company. To change the billing address for your
Xbox LIVE or Zune account, see
Change your Xbox LIVE account information.



On top of that, see
Xbox LIVE credit card error codes to troubleshoot common credit card problems.



Let us know how it goes, and post back.

Hope this helps!

Hello Reverse_YT,

Thank you for your post. I understand you are experiencing an issue with redeeming a code because of a past-due subscription. To address this, please visit the following page:

Update Payment Information.

I hope this helps.

please dont post personal information on these forums such as email billing address or credit card info. About the gamertag it could be that your gamertag was changed because it may have violate Code of Conduct.

Hey there, JamXMasta. Are you seeing any numerical error codes after that message? I would definitely recommend double checking your billing address as italy mentioned. Keep us posted!