Xbox Live Gold Digital Code Validity Period

Per the terms and conditions, you should receive a code for the 3 months within 2 weeks.

https://www.xbox.com/en-US/promotions/gold-offer

Terms and conditions

*Valid only for non-Gold members who are active on Xbox console and have played a first party shooter game in the past 6 months. Limit: 1 offer per account while supplies last; credit card required. After promotional
period, subscription continues to be charged at the then-current regular monthly price (subject to change) unless cancelled. Plus applicable taxes. Offer not valid on prior Xbox Live Gold purchases and cannot be combined with any other offer. A digital code
valid for 3 months of Xbox Live Gold will be sent to your Xbox Message Center in approximately 2 weeks. Only valid through link in this offer in the US, United Kingdom, France, Germany, Canada, Mexico, Brazil and Australia. (Valid from 10/17 to 10/31)

I'm afraid that this is not a valid form of payment to get EA Access since it is a recurring subscription. You can try to reach out official Xbox Support to see if there is anything that they can do: http://support.xbox.com/contact-us

This mode of payment by the way can be used towards Xbox Live Gold Subscription - Digital Codes : https://www.microsoft.com/store/d/xbox-live-gold-membership-digital-code/cfq7ttc0k5zm/0002

Hello Cadavertian!

Can you play online games? If the answer is yes, its activated but with 14 days trial has some restrictions:

The following limitations and restrictions apply to Xbox Live trials from games or console bundles:

• If you have an existing paid Xbox Live Gold subscription, you can’t redeem an Xbox Live Gold trial from games or console bundles to extend your subscription period. However, you can redeem the digital code once your current paid subscription expires.
• Redeemable codes for Xbox Live Gold trial subscriptions are only available in select games and console bundles.
• You can’t stack redeemable codes for Xbox Live Gold trials from games or console bundles. This means that you can’t start another trial period before your current trial period has finished. However, you can purchase an Xbox Live Gold subscription and start
  that subscription at any time during the trial period.

Hello Master Liu Kang!

Sorry to hear you are having issues with the regions of the store for digital codes.

Making sure your Xbox digital subscription is valid for your country

Important changes for Xbox Live customers who purchase digital codes from the Microsoft Store or other third-party resellers:

• To ensure that pricing for the Xbox Live Gold subscription service reflects the local market economies, all Xbox Live Gold subscription cards will now only be redeemable in the country purchased and cannot be redeemed in any other country.
• If you’re purchasing an Xbox Live Gold subscription card online, we strongly recommend that you purchase the card from the country that you live in to avoid potential issues. This includes purchases from third-party online resellers who advertise lower-priced
  codes than retail value.

Below is the link to everything about making sure you only buy codes or subscriptions in your region.

https://support.xbox.com/en-US/bill...ur-xbox-subscription-is-valid-in-your-country

salut tout va bien? ne peuvent être assurés que le code est valide pendant 12 mois Xbox Live Gold/

[ Translation-Hi all goes well?
can be assured that the
code is valid for 12
months Xbox Live Gold.]