bought Minecraft on microsoft store, Mojang doesn't see it

Hello,

I bought Minecraft for Windows 10 on Microsoft store. In order to connect to an existing server I need to lounch Micraft in a previous version. I found on forums that only Minecraft laucher can help me do it but when I installed it from Mojang, they ask
me to create an account than to pay again to buy Minecraft. What can I do? Can someone help me please?

:)

 

I need help

Dear mojang team,

I have to buy minecraft on 13.4.16 on the play store but Minecraft say i haven't a Lizenz for minecraft

 

Can't reedeem gift code

Players who already have the previous PC or Mac edition of Minecraft (running on Java) can
download Minecraft: Windows 10 Edition for free.

Note You'll need to get a code from Mojang, the game developer, by signing in to your Mojang account before attempting to redeem your code for Minecraft: Windows 10 Edition. Otherwise, you
may incur a charge. To get your code from Mojang:

1. Sign in with your Mojang account.
   
2. Under Minecraft: Windows 10 Edition, select the link to request a code. Microsoft Windows 10 will open.
   
   Note You'll need to sign in to or create a Microsoft account. If you sign in, use the Microsoft account you use to sign in to your Xbox account.
   
3. If you're running Windows 10, you'll be able to download the game right after redeeming your code. If you're running an earlier operating system, you'll need to come back to Microsoft Store once you're running Windows 10.
   

The code you receive from Mojang will be kept on your account, in case you’re unable to redeem it straight away, or in case you have problems trying to redeem it in Microsoft Store.

For more info:
https://support.xbox.com/en-US/games/game-titles/minecraft-windows-10-edition-faq