I have signed nbn 50 plan, the speed was ok. I could get 45Mbps. But now, at best, it can get 23.5 Mpbs download speed, and my ip address frequently changed. Since I am working at home and use vpn some times, this is really not convenient.
Welcome to TPG Community!
We're sorry to hear about your speed issue though we recommend that you check this community article about Troubleshooting a Slow Internet Connection at https://community.tpg.com.au/t5/Featured-Articles/Troubleshooting-a-Slow-Internet-Connection/ba-p/11... as this may be of help.
You can also check Easy Steps to Improve Wi-Fi Connection In Your Home at https://community.tpg.com.au/t5/Featured-Articles/Easy-Steps-to-Improve-Wi-Fi-Connection-In-Your-Hom...
Let us know how it goes.