Log in to your modem and check the connection speed. It's the bottom box on the "Advanced " tab on the Archer. It's fast to do and it will tell you if it's the modem/line(low connection speed) or the PC/network (normal connection speed)
We've created some articles that will help you troubleshoot the Slow speed issue.
If you are using a WIFI connection, then you may check these links to improve your home network.
If you need further assistance, please send us a private message with your TPG customer ID, username and complete address so we can take a look at your account.
To send a PM, please refer to this link: How do I private message (PM) in the community