Your description of the issue is unclear, presumably your complaint is about needing a new cable from the telegraph pole to your home , ‘’ smart hub 2 needing new cables’ has no context and is misleading nonsense.
If your existing service is Plusnet FTTC and you are migrating to BT but keeping FTTC then you wouldn’t get an engineer visit, so that suggests you are getting FTTP ( even though the ‘speed’ you are paying for doesn’t need FTTP to deliver it )
If you are getting FTTP , you require a engineer visit , as a new fibre cable needs to be installed , the existing copper cable will either continue to provide the phone service or will be redundant, however the new cable needs to adhere to the current safety requirements, like height over the road, proximity to hazards etc, if the Openreach installer or OR contractor cannot install the new cable because of this , then obviously, a delay is inevitable while alternative arrangements are made, why should the installer take a ‘ risk’ with their own or the public’s safety, rules about safety shouldn’t just be ignored just for your benefit.
If your complaint is why wasn’t this ‘issue’ discovered in advance , it’s because this situation with overhead provides is probably quite rare , and arranging a survey before every overhead job is expensive , and ultimately everyone would have to pay for this ‘policy’ in increased rental etc, the ISPs and regulator are involved in policy’s like that, and if 90% of surveys come back with a ‘no problem, go ahead’ answer , they bellyache that the costs are more than the benefit, so chances are OR have to keep costs down to keep ISP’s and OFCOM happy.
In my example you are unfortunately be in the small group that would have benefited from a pre install survey , but only to the point that you would be told of the delay before rather than after the installer visit, the issue would still need addressing.
BT may have a stop sale of FTTC if FTTP is available, hence the change of system ( FTTC to FTTP )even though you are not ‘upgrading’ your speed, if you are happy with FTTC , then you may be able to keep FTTC with someone else, who haven’t ( yet ) stopped selling FTTC in FTTP areas.
Plusnet are generally seen as a budget provider, so it’s ( IMHO ) unlikely that it was a cost based decision to switch from PN to BT , so what was your rationale, perhaps you can rejoin PN and stay on FTTC .
Lastly, there is no reason why PN should disconnect your current FTTC service because of this delay , so it’s unclear exactly what your issue is, apart from potentially having to take another day off when the overhead issues are resolved and a new appointment made.
