@Anney80
See this link for a “check status” button.
https://help.nowtv.com/article/having-trouble-with-your-broadband
Try setting the router back to factory settings by holding the reset button for 15 seconds.
If all fails call the broadband team and ask for full investigation all the way to the cabinet. See link below for the number.
https://help.nowtv.com/article/how-to-submit-a-broadband-complaint1
FYI that I do not work for NOW, just a NOW customer trying to help