My property was weeks away from getting ducts and cabinets and overnight virgin media moved out on mass leaving lots and lots of homes left without the new service after putting in cabinets and ducts to literally half the same street as me and neighbouring streets.
It has occasionally happened that VM abandons an area like this. I've never quite understood why as digging and installing ducting is the most expensive part of providing service.
Usually its just poorly planned expansions, some projects needed to be cut to fix a financial strain so some things will just get abandoned, we had a similar thing where morissons went and built an entire store right up to being retail ready and then decided they didn't want it anymore so leases it out to another company lol
you need to remember that virgin have no obligation to provide service to any property. all decisions are made purely on finances and whether it's good for the business. they have decided that the rewards will be less than the the cost to expand - thus they cease the works.
you yourself wouldn't keep throwing money at keeping a car on the road if the costs outweighed the benefits, so why should virgin do it just because it upsets you?