I am sorry but I cannot give you good news. I'm afraid you are in difficulty here.
I have to tell you the truth.
You could always try to sue and harassment.
There are two problems. The first is that they will probably say that they have a lawful cause because they are chasing in a debt. That might be erroneous but the difficulty is that one side always loses in court
Effect of that ruling would be that anybody who claimed did not succeed could be sued in harassment.
The second is that you have suffered no loss that can be quantified and that is the basis of a claim and harassment. You may get £100 for pain and suffering but not much more and so the short answer is it isn’t worth it.
I am sorry but it would be wrong of me to avoid giving you the downside of your position.
Do remember that I can only give you my opinion.
Another lawyer may have a different opinion. Litigation needs at least 2 parties and neither goes to court expecting to lose.
Nonetheless, one of them does, even though they have been told by their respective legal advisers that they have a good chance of success.
If there was a black-and-white answer to every legal problem there would be no need for anything to ever proceed to court.
The ultimate decision comes from a county court judge in a civil case or from the magistrate in a criminal case heard in the magistrates court or the jury in Crown Court.
Hope this helps. Please let me know if you need more information.
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