I was charged for wifi when the engineers hadn't even been to the building and I did not have the actual box until days later. I'm paying for a service I did not have yet.
You weren’t charged for wifi, you were charged for the broadband connection.
Call the broadband team to get it sorted out. See link below for number.https://help.nowtv.com/article/how-to-submit-a-broadband-complaint1