@Anonymous User
As far as I’m aware the free trail is for new customers only. So I would believe you’ve used the free trail up in this instance.
There are usually offers you can get, plus with Black Friday round the corner.
You can always head onto live chat to see what they say.
https://help.nowtv.com/article/how-to-submit-a-complaint
FYI that I do not work for NOW, just a NOW customer trying to help