@Acotty
You don’t call NOW. The call centre is for broadband customers ONLY.
Live chat is what you want. Make sure to be signed in and use the ‘How to get in touch’ drop down.
https://help.nowtv.com/get-in-touch/tv/payment-card-expired-or-declined
In that link it suggests updating the payment card. Give it a try.
FYI that I do not work for NOW, just a NOW customer trying to help
