@Jensensi
What membership did you have? As NOW provides multiple memberships from cinema, entertainment to hayu.
Did you receive confirmation email of the cancellation?
There is a phone number but is reserved for broadband ONLY, if you try calling they will redirect you to live chat.
If you do a quick search on the forum you will see many threads of ways to get in touch. As this is account related nothing will get done on the forum as this is not how the forum is used. Staff seldom post on it.
Live chat you click "chat online" within the green box, don't hit "get help quicker" this a bot.
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