Welcome to TPG Community!
We have located the account using your community details and we can see that you are currently on an ADSL2+ service.
As you may be aware, the actual speeds for this type of service will vary due to many factors including distance from the local telephone exchange, the quality of the customer's copper phone line, cabling and equipment.
Considering the factors mentioned above and the copper cable distance, which is 1332m as per TPG Maps; http://tpg.com.au/maps/, we're expecting you to get around 12Mbps download and 1Mbps upload speed.
That being said, the speed you are getting at the moment is within specification.
Let us know if we can be of any assistance. Thank you.