Scroll down the page and click on the red Message Us icon at the ebottom of the page.
Please note that option isn't available 24/7 as phone calls have priority.
You could try the text messaging service. Just send a text with a short description of your issue to 07533 051809. Your message will go into a queue and a representative will respond to you as soon as possible. It may take a few days.
You can also call 150 from a Virgin landline, or 0345 454 1111, butbest to call at 8am to avoid call queues
The Service you do for others is the rent you pay for your room here on Earth - Muhammad Ali