I purchased minecraft from Microsoft Live and can't get the redeem code

you don't get a code if you purchased from the microsoft store, it will be in your purchase history or download history to download to your computer, it has to be downloaded from the account that made the purchase.

From the game developer support page:

"Players who have purchased Minecraft: Java Edition before October 19th, 2018 can get Minecraft for Windows 10 for free by visiting their Mojang account. Log into
account.mojang.com, and under the “My Games” heading you will find a button to claim your gift code. If you purchased Minecraft: Java Edition after October
19th, 2018, the button will not be there, so if you’re unsure of when you purchased Minecraft: Java Edition, that’s a good way to check. Pressing the button will generate a token and send you to a Microsoft redemption page.



If you have an older Minecraft account (you still log in with your username), visit
this article to find out about account migration. Once you’ve migrated your account, you will
be able to claim a code for Minecraft for Windows 10.

You must be signed into a Microsoft/Xbox Live account in order to redeem the code. Please note that you cannot move the license once the code has been redeemed. Your code is saved on
your Mojang account page for future reference"

I did already redeemed it when i bought Minecraft: Java Editon ( May 27, 2017) and immediately redeemed it by clicking the redeem button. So the question is, is the code only for one device or for the account so you can download it on any device but right
now i can't seem to get it properly say that i have bought it.

My friend send me a gift card but i can't redeem it.

it say "This code can't be redeemed. It was purchased in a different region from your account."
how do you redeem the code from my friend that live in different region.

You cant. Your friend will have to request a refund for the code and purchase a code for you that is meant for your region.

are you using the Microsoft store to purchase minecraft? other times it will just show up under your purchase history if you have gotten it from a code that was redeemed.

I purchased the Minecraft game on Amazon not on Microsoft but I redeemed the code. How can I transfer the code to my grandson?