Does the service status page show the fault at all?
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Welcome to our Community and thanks so much for your first post - sorry that you've been having some issues with your broadband recently and have been advised of some network issues when running through the online self-checks.
I have located your account from your forum information and can see that you last rebooted around 2 days ago and at the time of checking there are some short term stability issues showing. If you have already checked the connections to your Hub then we would need to book you a technician visit.
Please pop back ASAP to let us know if you have checked the connections and if no joy, let us know and we'll get a technician booked in for you 🙂