You can try Ofcom but they do not deal with individual complaints.
If there is someone vulnerable they can register their line in advance and extra effort is made to keep a service running, which can mean things like mobile phones delivered to allow contact if a line is without voice service.
The only time Openreach would be allowed to trespass and remove the blocking green stuff would be this was deemed an emergency, e.g. car crashes into pole and pole is left in a dangerous condition.
No engineer will go onto any ones land unless they know they have the clearance, (a) it would mean the sack for breaking company policy and (b) they could be done for trespass individually.
If the phone is working well enough to make an emergency call then a crackly line will be down the list of priorities. That is the harsh reality, requesting BT to install a new telephone pole and run new copper is not going to win you many friends in the call centres.
Edited by MrSaffron (Wed 17-Dec-14 12:46:12)