Xbox won't let me insert a digital code it says I already own the game even though I don't...

When I got my Xbox one I had a digital code that came with it for Minecraft. I enter the code in months ago and now it's telling me that I don't own the game and it wants me to buy the damn game again. How do I fix this without buying the stupid game again.
I even tried re-entering the digital code but it said that the code has already been redeemed. It makes sense because it was redeemed with my console, but my console is still saying that I don't own the game. Please tell me what to do before I sell my console

I cant event get mine to install, I get an error saying it's not backward compatible even though I can pull up the game in store for purchase & install. I get error code (0X8082000C) of the disk when inserted for install. not spending $20.00 to install
a game I already own.

I've already asked support. It just won't let me redeem the code,Even though it's redeemable.

I'm assuming you're referring to GTA V? That game is not available through Microsoft for PC. You would have to purchase it for PC in order to play it on PC.

Hello, my name is Fernando, an independent consultant. Hope you are doing great. I will be more than happy to help you with your query today.

The link below contains information that may help your case:

https://support.xbox.com/en-US/help/subscriptions-billing/manage-subscriptions/xbox-game-pass-pc-faq

(Note) The link being shared is in English and may require translation software to read the page content.

Hope I helped, see you soon!