The internet light is flashing, and there isn't internet connection. I switched off and on the router but nothing changed, I reset it and still nothing. I checked the cables and everything seems fine but still no internet. I don't know what is the issue.
Welcome to the forums and for your first post - sorry to understand that you were having some issues with your broadband during the week.
I do hope things are looking ok for you since your post?
If you're still having issues and nothing is listed on the link @andybrock posted, please sign into your online account and go through the self checks; you can also download our free Connect App which can help diagnose issues.