I forgot to add to my post. a report to the police could help. It's not a criminal matter, but they are often open to a civil intervention if an 'administrative fee' is paid. A conversation along these lines may assist. Having explained the situation, words to this effect:
"I know that this is not a criminal matter, more a matter of him disturbing my harmony. Perhaps you would be kind enough to have a word with him. I understand that this is a civil matter and therefore an administrative fee may be charged in circumstances such as this?" Two alternatives here: " perhaps you would be kind enough to tell me how much this fee is" or : " I have heard that the fee is usually 5,000 ( pick a number) Baht, is this correct?"
Best to have this conversation with just one cop, not a group of them.
It worked for me once.