Not sure if you mean you can't get through due to waiting times, or no dialtone.
Given you are posted this online, are you able to access live chat via
https://www.virginmedia.com/help/live-chat?
Does your landline work to call 150?
Or on mobile 0800 052 0422 (technically customer services)
Or 0345 454 1111 (Tech support) if you have minutes.