FB Wallet


A couple of years ago I've purchased a FB gift card for myself. I've since redeemed it and am trying to purchase a one year subscription to FB Plus. However, even after I've checked the Apply FB Wallet funds box, it takes me to authorising the payment in the card that I've had to enter. I would really rather not have to enter any card informations and just use the money I have in my wallet.

I also don't understand why is my card being charged when I have the funds available in my wallet.

How can I use the amount I have in my Wallet without entering any card ?

Thanks in advance :)