How to lodge a support call / complaint with "Online Ticket"

[#1]

Need to contact support but all avenues are closed off.

1. Chat is offline
2. Phones not answered (1 disconnect after 1hr)

In the code of practice it mentions "online ticket" but I cant find any trace of this.
There is this page, https://portal.plus.net/wizard/index.html
but only accepts  specific criteria  

I just can get help anywhere; been trying off & on for weeks now!
Looks like Ill have to  write & post by letter.

[#2]

Hi @ncking and Welcome to our Community Forums.
I'm sincerely sorry to hear you've had trouble trying to get through to us recently and I'd be more than happy to help resolve any problems you're having with your service currently.
If you could please drop me the username for your account over private message along with your reason for contacting then I'll do my best in trying to resolve this for you.
I look forwards to hearing from you.

Moderator's note by Dick (Strat): Typo corrected.