I've worked for Tru Energy, Energy Australia, Ausnet, Alinta, and Horizon Power, so I have a massive knowledge base lol but mostly for Vic, NSW and WA.

With that evidence you have, and any documentation from Ausnet, you can ensure you won't be overcharged if ausnets data doesn't make it to your provider, or it isn't actioned before your next bill.

Your provider may say it will work itself out in the next actual read of your meter, but you should be able to get it adjusted with a self-read. They may ask you to provide photo evidence of your meter reading, which it sounds like you have.

Once it is fixed and you have the documentation, save it and call your provider and go over your options. Don't be afraid to politely ask for a senior, as they will have more authority (generally) to action changes/input your self read. Your consultant may push back before giving you to a senior, but that's because their Team Leader and Management have KPIs and one of them is reducing "escalations".

Let me know if you need further advice!!