Welcome to the Community!
I can see that the issue has now been escalated to our Engineering Team and Telstra is scheduled to check on your service between now and 22/Mar/2019.
Our Engineering is closely monitoring the the issue. They will be in touch as soon as an update becomes available.
Apologies for the inconvenience.
We have likewise replied to your post located here:
We will monitor your service to see if the service will experience drop outs again.