You are welcome, @arminglf.
If the slow speed is still evident later tonight. Please try to test with both Wired and WiFi connection if there's any difference. This will help us narrow down the possible cause of the issue.
Let us know should you require further assistance.
I tested the connection last night and it was fine with stable speeds of 45 - 47 Mpbs and also this morning so I guess it's all good now. If I have any issues in the future I'll open a new post but hopefully not, I've been with TPG for more than 6 years and haven't had many issues really.
Thanks for your help.