Welcome to the Community!
Thanks for raising this to us and my apologies for the trouble.
I've located your account using your Community details and has run remote tests on the line.
Currently, the test results does not show a physical issue with the line outside.
Nonetheless, I've now case to our programmers to resolve this issue remotely.
Please allow 24 - 48hrs for us to provide you with an update regarding this case.
Your experience is important to us and we will be keeping a close eye on your case and will provide you with updates where possible.