Thank you for your question - were you forwarned about this by anyone?
I don’t deal with money, I only deal with answering questions. You asked for a telephone call and there is an extra cost for a telephone call. I will just deal with this within the original fee and you will need to email admin about refund of the cost of the telephone call.
You ask where you stand if you break the wall/fence. The neighbour can refer the matter to the police with a view to having you prosecuted for criminal damage. It is as simple as that.
If you want them to remove whatever it is they have put then you can only apply to court for an injunction if it causes a nuisance or they have been negligent. You cannot take them to court for breaching planning consent, that is a matter for the Local Planning department.
With regard to them having broken your fence, assuming the fence is yours and not jointly owned, that is also criminal damage and is a matter for the police.
Can I clarify anything else for you?