Hi Kath,
Christy let me know the address in question is fine on the system. Unfortunately phone support begs to differ!
I spoke to someone on the moving team who agreed it was peculiar, as buildings like mine usually request all flats be connected or none at all, and it would be strange that 1-2 flats randomly spread throughout wouldn't have a connection (usually it could be, say, the entire top floor)
He was going to escalate this to be checked as priority and get back to me in 72h. Unfortunately I've heard nothing since and will call back Monday or Tuesday.
In the meantime, I've also been in touch with the building managers who could confirm VM have previously done work in the building.