Terms and conditions
Voucher - Xbox Subscriptions - GreeceVisit https://support.xbox.com/en-US/help/subscriptions-billing/manage-subscriptions/ensure-xbox-subscription-is-valid-for-your-country
Sign in to Xbox Live using the account for which you want to use the prepaid code. Press the Guide button on the controller. Go to Games & Apps and select Redeem Code. Enter the 25-character prepaid code and select Done.
Do you need more information? Please send an email to firstname.lastname@example.org