Hi and welcome to the forum,
The reason why you've been charged is because the NOW TV service(s) you've subscribed to 'rolls on' automatically if it's not cancelled prior to any 'free trial', 'voucher pass' or 'monthly' subscription expiring!
You might be able to get your subcription payment(s) returned but obviously the NOW TV people will check to see when you last viewed the service(s) you subscribed to...
Anyway, I suggest you access the forums 'live chat' facility (preferably by using a Windows or Mac computer, not a mobile device) between 08:00-24:00Hrs and explain your requirements to them.
Click on the following: Manage my account link.
- Scroll down to the 'Contact Us' button (on the bottom left of the web page) and click on it.
- A new web page should open up with the 'Live Chat' button at the top right of the page.
- Click on the 'Live Chat' button and a new window should open up, with a range of drop-down options and a 'Request Chat' button.