Your internet connection speed can depend on various factors such as PC’s infected with spyware/viruses, torrents, P2P services, and downloads. These are the most common symptoms relating to higher usage of your internet connection bandwidth.
Your internet speeds can also be affected by any unfiltered devices that are connected, which can cause poor line statistics. An isolation test can help in these situations.
If your speeds are still unreliable, please contact support on 1300 655 982 to discuss your issue further.