Yep - 150 from a Virgin phone, or 0345 4541111 from any other phone, and choose the "I have a fault" options.
You should be aware that VM are not currently undertaking non-fault visits, which this would likely be classed as. As and when that changes, there's normally a £99 charge for these visits.
You can check the current policy at https://www.virginmedia.com/help/coronavirus-update
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