Thank you for the screenshots @measum12.
In the first image, I noticed that there's a "Setup and Configuration".
Are you able to click on it and provide us a screenshot of what it will provide?
Thank you @measum12.
Try to uncheck the "Connecting to Optus" option.
Then, try to put your TPG credentials instead of the Optus credentials on the username/Email and password box.
Click save, then let's see how it goes.
You may also provide us a screenshot if there's any changes after unchecking the said option.