Compras en la tienda de xbox [Shopping in the xbox store]

Me regalaron una tarjeta de $10 para xbox. Canjee la tarjeta a mi cuenta, y cuando quiero comprar algo en la tienda, no me sale ninguna opción de pago que para usar los $10.

Aclaro que lo que quiero comprar cuesta menos de $10 y que al verificar mi cuenta, los $10 si fueron cargados a mis fondos.

Ayuda por favor

[Translation-They gave me a $10 card for xbox. Redeem the card to my account, and when I want to buy something in the store, I don't get any payment options to use the $10.

I make it clear that what I want to buy costs less than $10 and that when I verify my account, the $10 if they were charged to my funds.

Help please]

:)