Thanks for getting back to us, @Nuffa1. It would be best to change your Wi-Fi to make sure.
We have located the account using your community details and we can see that your data usage for NBN is almost the same when you have ADSL service.
You can log in to TPG My Account to view your data usage.
This article can help you:
Using TPG My Account & Online Account Info
Should you need further assistance, please let us know. Thank you.
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