Get online support
Welcome to the Community!
The speed you're getting is definitely not normal. With your community detail as a reference, I was able to pull up your account and run some tests.
The diagnostic results indicate a line fault that needs to be investigated by NBNCo. I have escalated your concern to our Engineering Team for assistance. You will be provided an update through SMS or phone call using the mobile number we have on file. If you want to provide a different contact number, PM me so I can forward it to our Engineering Team.
How to PM? Visit this link.
Regards,