The website and player each perform so badly for their own respective reasons. On a browser the search function is extremely finicky, often freaking out when you want to search for something forcing you to go through highly convoluted routes to find what show you want to watch. And when you get the player to work, if you click on your mouse for any reason it will ###### itself, give you a black screen so you have to refresh the page. It really ruins the experience of streaming movies and tv shows
Set a Payment PIN on your account so that no-one but you can buy memberships on it. Check your bank accounts monthly for any other unexpected payments to Now. That way you can at least nip them in the bud, while you and Now figure out whose fault they are.