Internets been down for over 24hours
Below are some standard things you can and probably have done before calling the team.
Can I assume you've checked the status of your line in this link?https://help.nowtv.com/article/having-trouble-with-your-broadband
Have you done a factory reset to the router indicated in the link below?https://help.nowtv.com/article/improve-broadband-speed
You need to call the broadband team. See link for number.https://help.nowtv.com/article/how-to-submit-a-broadband-complaint1
This link also shows any planned outages as well wide spread faults.https://help.nowtv.com/service-status