Yes, NowTV have fubared the latest release.
Can you go to iPadOS 13?
Shouldn't be necessary of course, ought to work from iOS 9 upwards, but this is a workaround, for those who can make the OS upgrade, in the meantime.
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.