D-Link Cobra DSL-5300 FTTN Config issues

[Woodsy321]

Hi All,
I've scoured this forum and others, found many people with identical symptoms to me but none of their solutions have worked for me.
As the heading suggests, I've got a new Cobra 5300 modem/router and I cannot get it working with TPG at all. I can set it up as a router hanging off the old TP Link modem and it works fine but I didn't fork out good money for a high end modem/router to just use it as a router.
I've almost tried every conceivable configuration, I've spent 2 hours on the phone to two different tech support guys at TPG as well as an hour on the phone to D-Link. Still no closer. D-Link assume it's an authentication error but TPG claim the credentials I am using are correct.
I can get the DSL light up, I can't get the internet light to stop blinking. On the home screen of the D-Link user interface it says cable connected but network status is disconnected.
HELP ME!

[david64]

Hi Woodsy321.

Have you read the manual?

What settings have you tried?

Set WAN access type to VDSL router and enable tagged vlan.

The settings are PPPoE, TPG username with @TPG.com.au on the end, password, and VLAN ID=2.

You can check the username and password by logging in to Post Office on your mobile phone.

For VLAN ID, set Internet VLAN ID=2 in Triple-Play section. 

In interface traffic type section, set each lan port, wireless and wireless guest zone to Internet.

[Woodsy321]

Yes, tried all of that. After the 4th hour on the phone and the 2nd call to D-Link with the 2nd technician, I have been advised to send the modem back. D-Link now believe it's faulty. This would make sense because when I opened the box it was missing the DSL filter/splitter, someone has already had this problem most likely, returned it to the store who have proceeded to re-sell it to me.
I will arrange the return and post back here with an update when I get a new one to try.
Thank you.