I just replaced my hub in order to not have the same technical issues but here I am again, been like this since yesterday.
Call the broadband team to see what they can do to help. Number in the link below.
https://help.nowtv.com/article/how-to-submit-a-broadband-complaint1
What technical issues do you have? And what do you mean by "I just replaced my hub" did Now send you a new one?