@Post and beam,
You'll not get comms from Openreach. They talk to their customer, which is not you, it's your broadband provider. I know this from having to deal with BT and Openreach during my working life. Openreach themselves are crap at comes internally let alone externally.
For my recent connection I started with Plusnet, and switched to EE on recommendation on here. EE were very good at keeping me informed. I also had a line of sight tree chopping issue.
Between switching from Plusnet and EE I did this myself as it was an easy job. As it happens EE would have covered the cost, unlike Plusnet. So, as you can see, choice of BB provider is important.
As has been said, persevere, but I do recommend using EE, and I have FTTP.