Is your phone working ?
Can your devices connect TO the router ?
If you log in to the router, put 192.168.1.1 in a browser and use the username and password on the back (it's NOt the WiFi password) what does the status show ?
I'm really sorry to hear this.
The line test has detected a possible fault towards the property.
Is the router currently connected at the test socket? Is your phone line working when making calls?