Yes its most frustrating isn't it, they let me down as well

They've installed fibre in surrounding areas outside of our estate, but not in our estate.
Except I know why, our estate is DIG, translated in to English that means direct in ground (no ducts or poles), and therefore considered too costly, in other words they can cover twice as many properties somewhere else for the same cost. How do I know, because I've spent many years following the broadband roll out, and have picked up things, and I know that our phone line is an armoured cable that's buried, it was considered cheaper to do away with ducts, but surely a standard cable in a duct is cheaper than an armoured cable???
Openreach are a business, they are not there for you, or to give you a reason as to why their plans have changed, they change for many reasons, which we can only make guesses at, educated or otherwise.
It could be anything from a blocked duct on a busy road, crossing a river or railway track, increased unforeseen costs, problems getting way leaves and difficulties, the list would be almost endless.
I'm lucky if you can call it lucky, as Virgin Media managed to install on our estate, and they started from scratch.