I had to order a new card so for a few days my payment couldn’t go through, so when my new card came I put updated my details but the payment still won’t go through?
Is it for TV or broadband?
If it’s the former I’d give it a day or two as normally it sorts itself out.
If it’s still not sorted jump onto live chat by clicking “chat online” within the green box and not “get help quicker” as this is a bot.
https://help.nowtv.com/article/how-to-submit-a-complaint