How Do I Apply My Wallet $$?

I received a gift for a year of FB Plus in September. I redeemed the gift code but it didn't allow me access to FB Plus.

Reading the Community page I saw that the $$ from the gift should be in Wallet. It is. But when I go to FB Plus the only options I get are to pay with a card or PayPal. How do I activate FB Plus with the $$ in Wallet?