Hi @Rhiannon ,
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