@Anonymous User
What do you mean, ‘the source’?
Are you saying you can’t use Now on a Now Black Box?
Are you saying you can’t start any app on your Now Black box?
What happens?
What has changed since 8 days ago?
Do you have any evidence that your broadband is still working OK?
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.
