Welcome to the Community!
We tried to search for your account using your community details to no avail.
We'd like to look into your account for better understanding of the situation and see what we can do to resolve this as soon as possible.
Please send me a PM with your TPG username or customer ID number to assist you accordingly.
You may also check the article that we've created, which will guide you on how to troubleshoot a Slow speed issue.