[weesteev]

You could try phoning back to see if any cancellations have opened up more time slots. Virgin doesn't keep engineers aside for this type of work, its just not economical for any business to operate like that.

Your issue is certainly a tricky one, if a cable repull is required this may not have been spotted at a pre-install survey. Its unfortunate that these things happen but its not the end of the world. You have placed your order at a busy time of the year so I think a bit of a delay is to be expected, especially now there is unforeseen work required.

As i said, try phoning back to see if they can pull the install forward for you, you might get lucky!