Welcome to TPG Community!
I would like to have a better understanding of your situation to address your request. Please PM us with your details like customer ID or username of the concerned account.
How do I private message (PM) in the community?
We've edited your post as it contains your account details.
Please refrain from posting any account details on a public post as it may compromise your security.
We've tested the line and was not able to detect any fault within the NBN network.
Are you using a WiFi or a Wired connection?
If via WiFi, there might be signal interference that affects your home WiFi network and causes the slow speed.
We've created some articles that may help you improve it.
An article is also available that will help you troubleshoot a slow speed issue.
Let us know how it goes.