DSL Light Flashing - Won't connect to Internet!

[#1]

I can't get my ASUS RT-N66U to connect to the Internet, I'm on PlusNet fibre, the Openreach modem has all lights green and DSL flashing green. It used to work fine but suddenly stopped working.
I'm using PPPOE and typing in the correct username and password. It just times out when trying to find a connection, asking would it like to search for a connection again.
What do I do?

[#2]

If the DSL light on the OR modem is flashing, you need to raise a fault ticket - https://portal.plus.net/apps/kbdfaults

[#3]

Is the Asus router at the trying to find the connection page or full router page (with all the options)?

[#4]

Oh right, yes the DSL light is flashing green.

[#5]

Try this from the BT faults page:
"
The DSL light is flashing green, on my Openreach modem. What should I do?
Your modem is connecting and may flash for a few minutes.
If it continues to flash:
    Check the DSL socket and make sure the cable is firmly connected. The other end of the cable should be firmly connected into the telephone line face plate.
    Your modem could have over-heated. Make sure it's in well ventilated, free-air and:
    1. Power off for 10 minutes.
    2. Power back on and wait a few minutes for the lights to come back on.
    Try resetting the modem:
    1. Press and hold down the Reset button on the back of the modem for 5 seconds.
    2. Release the button and wait a few minutes for the Power light to come on.
    Try disconnecting the power cable - wait a few minutes & then reconnect. After a few more minutes the Power light should come on."
Good luck.

[#6]

I've raised a support ticket Question #76042552
But as yet have no reply. So I'm without the internet I'm paying for.

[#7]

Still nothing yet. No response at all.

[#8]

Still no contact from anyone since I submitted the ticket!
Without the internet still. 

[#9]

Hi JamesU2002,
Really sorry about the issue. We do our best to respond to faults within 72 hours of being raised to us. We understand how frustrating it can be to be without broadband, especially after things running smoothly for a long while but you should have a response soon.

Quote

So I'm without the internet I'm paying for.

We should be crediting you for any downtime experienced when we're sure that the fault has been resolved. I'd recommend mentioning that at the time to make absolutely sure that gets done.

[#10]

Will I get some form of response today? It would be nice to know when it might possibly be fixed!

[#11]

I can see that our faults team have picked your ticket up this morning and they due to call you later today.
I also see you're now connected.