Purchased a $50 xbox giftcard only to find out you cant buy minecraft java

https://www.xbox.com/en-us/games/store/minecraft-launcher/9pgw18npbzv5

This contains both versions. They were unified a few weeks ago

If you've already redeemed the card, it wouldn't be possible to refund it. If you haven't redeemed it, you would have to contact where you purchased it from to see if they will refund it.

Wait cant i do it like this

Redeem 2 $25 xbox giftcards first. Then go to minecraft and click buy. Then select the microsoft balance option ( money from redeeming giftcards). Then wait for it to purchase. Then go into the xbox app and go to minecraft and enter the game. Then login into the acc that has it. Then i can play minecraft java and bedrock edition. This is another way right? Like i can redeem multiple giftcards until it reaches $40 and then i buy minecraft and play it. Does this work aswell?

So then do i redeem the code on the giftcard and click next?

And does it have to be the exaclty the same like minecraft java and bedrock edition costs $40 and i have a $50 xbox can i still get minecraft java and bedrock edition even if the xbox giftcard value $10 more?

But do i use my xbox account to play minecraft?

And you can redeem a code for minecraft java and bedrock edition from a xbox giftcard rather than a microsoft giftcard right?