You did authorise those charges, sort of, via a rather sneaky procedure that Now have been employing, whereby the form on which you signed up for Entertainment, say, also has preset Free Trials for Cinema and Boost. Which you should delete from the sign-up form if you don’t want them, or at least Cancel each one during its free trial, if you don’t want it to turn into a paid subscription at the end of the free trial.
But it seems you didn’t notice this. And the way it was being done, you may not even have realised you were getting free trials, let alone that you needed to cancel them 😢
But I’m pleased to say that it looks like Now has mended its ways, and no longer preticks any boxes on these forms, beyond for the main item on each. The other offers are still there, but you have to actively select them now, if you want them. Much more satisfactory 😇
To get a refund for these extra unexpected charges, you have to talk to Now on Live Chat, which @gavs82008 kindly links to above. Though even from here, people have trouble:-
This is the page it goes to:-
And you have to click the tiny green chevron (downward pointing arrow) at the bottom of the page, rather than anything larger and more inviting above, and get:-
The green rectangle marked ‘Live Chat’. The Holy Grail of Now Streaming support. Press this, during the appointed hours, and you will ‘talk’ to a real live person who you can discuss your issues with, and hopefully get a resolution.
