Welcome to the community!
I'd love to help and see what is happening on your connection. I'd like to know on which device(s) you experience a slow connection? Have you tried to run a speed test? If yes kindly post the result on this thread.
Thanks for raising this to us. We ran an initial test on your connection and it shows multiple dropouts and a possible line fault on the line.
We would like to confirm if you are also having issues with the home phone service like static noise or no dial tone. If so, please raise this to Telstra to check the line as it affects your Standalone ADSL2+
We'll wait for your response, let us know how it will go.