Hi Twistedsister,
Sorry to see of the issues that you've been having.
You would need to speak to a Virgin Media representative if the technician has been completely cancelled. You can re-arrange via the My Virgin Media application if the booking is still open
I'm happy to take a look at this if this has not yet been resolved.
Feel free to give me a nudge if you need my support on this issue.
David_Bn