I had the same problem when I upgraded our flights to F from CW, I’ve been told the back office reissue tickets based on travel dates, so like us, our travel date is not till Feb19, they would sort all the tickets before our travel dates before reissuing ours. BA doesn’t take the money off your card till they’ve reissued your tickets. BA system can only hold your CVV for a week, after that you need to give them the CVV again. I’ve rang You First a few times before someone would do it over the phone for me rather than ask me to wait.