You are being harassed.
Harassment is defined as a course of action (more than once) which is intended to harass, does harass, is reckless as to whether it harasses, or if the average bystander would look at the conduct and think that it was indeed harassment.
Harassment is both a civil matter and a criminal matter.
If a person is being harassed, they can go to the police and ask them to warn the alleged culprit under the Protection from Harassment Act. Some police forces take harassment very seriously and others not so and therefore, the person who is being allegedly harassed may need to speak to a senior officer or put a complaint in writing to the Chief Constable.
If you think that she knows people in the police and as a result they don’t do anything about it, then make a complaint in writing to the Chief Constable.
You can of course make an application to court for a civil injunction to stop the neighbour speaking to you either directly or through 1/3 party or harassing you in any other way and you can ask the court to award costs against her.
Thank you for letting me assist you with your legal question. I am glad that I was able to help.
I am not certain whether that answers the question for you or not, but I am happy to answer any specific points arising from this.
It will be my pleasure to help you again either further with this or any future questions you have