$100 gift card not working

When I reach 50, it will be a $50 gift card, and when I reach 100 it will be a $100 gift card to someplace, havent decided yet.

I'm not 100% but if it was an Xbox gift card and not a Microsoft gift card you might have to buy the games using a console rather than on a pc

You can apply both gift cards to your account and they will combine as 1 Microsoft account credit. For example if you wanted to buy a game worth $100 but you had 2x $50 gift cards, you can apply both of the $50 gift cards and then purchase the game (as they will combine both gift cards into a single $100 account credit)

To apply gift cards to your account use this link: https://redeem.microsoft.com/

Alternatively, you can also apply gift cards to your account by opening up the Microsoft store app > Hovering over the menu > then select “redeem”.

i purchased it on the 18th with an 100$ Xbox gift card.

Ive cashed in a few 100 dollar Microsoft gift cards.