Welcome to the community!
I was able to locate your account using your community details. I ran initial tests on your service and it shows a possible line fault.
I would like to arrange a call from one of our Technicians for further test and investigation. I'd like to get your best contact number and preferred time.
In case you need a reference: How to send a PM.
I understand that you were able to speak with our Tech team and the case was escalated to our Engineering team. There was an evident fault on the copper network and they've requested for the help of Telstra's technician to resolve this. We were advised that they will check the service anytime until the 7th of November. Further updates will be given by them.