so i made an alt (alternate) account on minecraft but when i login it only shows me the...

I did that, and I redeemed the code on my alt. But it still didn't give me free Windows 10 Minecraft. Am I not doing it right?

If you redeemed the Code on your "alt", then Minecraft Windows 10 is bound to that account only.

In order to get Minecraft on your PC then, you would have to open the Store app on your Windows 10 device, and in the upper right, sign out of your "non-alt" account in the store app. Then sign in with your "alt" account, and you should find Windows 10 Minecraft
in your account's library. Simply download Minecraft from the library, and you should be able to play the game on your "non-alt" account as well.

But only your "alt" account that originally redeemed the code can re-download Minecraft from the store. No one else can.

Yes I cannot login to billing.

When I first made my windows login I typo'd my alternate email address so the email connected to billing access is a dead end until july 6th when its wiped off my account.

You mentioned on your post that "3 weeks ago i unlinked my main account from mc to log in an alt". How exactly have you unlinked your Microsoft account to login with an alternative account?

You played with both Microsoft accounts (main and alternative) using the same Playstation account?

I cant login onto the mojang site using my microsoft account. It says unknown email or password when im certain its correct. I can login onto minecraft.net and it shows my minecraft profile and my xbox account information. When I try to launch minecraft it say that I need to buy the app again and when I refunded the minecraft launcher it was removed from my device. I had only cancelled a game pass subscription.

also another thing it lets me login to my alt accounts but not my main account so now im just confused