It's disappointing to hear about your experience with your NBN internet @PZeimer. We have tools and teams that can help with getting your connection back into good shape.
First things first, have you checked our Network Status Page for any outages, faults or planned works in the area? Make sure to click the "NBN, Cable & ADSL" tab and enter your address to check this. If there's an issue listed, you'll be able to register for updates.
We also recommend going through our Home Internet Troubleshooting Guide and following those steps to see if it resolves your issues.
Did we answer your question? Please mark it as a Accepted Solution and if you see something that was helpful to you or the rest of the community, giving a Kudos is only a click away.