Jackal1 wrote:The cabinet is higher than before so it should have had planning permission and it’s been put in my hedge and wrecked it but I can’t replace it with a fence as it’s across the boundary line.
IMO, you have two separate issue to deal with then.
The placement and size of the cabinet is one for the council. AIUI, telecoms providers have certain rights under 'permitted development' as to where they place equipment in the street. When they notify the council, it is often not much more than a formality
You would have to find out from the council if they were notified and whether the change in size of the cabinet is relevant for consideration by the council.
In a recent similar past topic
Fibre cable cabinet installed on my property without knowledge or our consent yesterday. | Virgin Media Community - 5646772
the OP managed to confirm with the council that an error (by the council) had been made in the cabinet placement. You may have an angle with the council if the proper process was not followed.
Do you know if the new cabinet takes up more space from your land than the previous one did i.e. has the new cabinet moved from the old position on the public street and taken space from your land because of its greater size or was the cabinet always partly on your land but hidden in the hedge?
If your hedge has been damaged then you would need to tackle VM directly about this.
From past 'property damage' type of topics on here. VM's method is to keep the complainant engaged in endless back and forward communication but with no meaningful action or resolution taking place (presumably in the hope the complainant gives up eventually and goes away without VM having to do anything).
I think you have to make a formal complaint to VM first of all and give VM an opportunity to correct and resolve the issue(s) before taking a legal route for property damage (which may be via small claims perhaps).
You need to get some proper legal advice from Citizens Advice on both issues or see if you have any legal services cover through your home insurance or other such types of legal cover.