The socket design has changed over years and many options now available. If you have a working service Virgin won't consider that as priority over a customer without service.
I am in agreement with Z92 to replace the socket yourself. If you can't find a Virgin van you can also purchase a box online.
You are not changing any cables therefore not against T&C.
When the engineer came round my house to instal socket I already had a hole pre-drilled from old TV arial. I asked the engineer to fit a euro style isolator on the cable and leave the rest for me to tidy.
Only the wall isolator was supplied by Virgin..the box is from Toolstation 🙂

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M200 Oomph - 5GB SIM + 3 extra SIM family plan - BT whole Wi-Fi - Sky Q
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Don't cry over Virgin price increase instead speak to retentions team and negotiate a better deal.