Can't buy anything due to region error

Thanks for getting back! May I ask if the payment or card you are using is originally created in Canada as well? Normally the card should be originated from Canada as well to prevent purchase issue. Now if it is a subscription you are trying to purchase and you still have exisiting subscription from another country, that might also cause conflict.

Also, are you trying to make purchase on your Xbox console or PC? Please don't provide any personal information here. If you will provide a screenshot, make sure to cover any of the personal information for security purposes.

Looking forward to hearing back from you.

Thanks!

Hi,
I updated:
Billing address on credit card
Address in My Profile at Microsoft account

I did "Change 360 account region" to Canada

BUT it didn't help

Hi! My name is Ben an Independent Advisor and hope you are doing well.

Let me try my best to assist you with this no worries! First, when you changed your billing address and payment details. May I ask if you have also tried changing your Xbox region? Aside from the console, you need to change it via https://account.xbox.com/en-gb/Settings/Home by clicking the "Change 360 account region" option there. Note: It will take 3 months before you can change your region again. Make sure to select the right region where you have migrated.

After changing your region, kindly try to purchase the transaction you are having problem with. Then let us know if ever there are still issue so we can try and assist further.

Kind regards,

Ben

I have foreign cart attached to my account (non-Canadian). I'm buying for PC

I'm not sure, you should check if the game is available in your region, if it is you shouldn't have problems to buy it.