Not a lot you can do, I wouldn't worry, do you really think the police have the time, or inclination to chase up a report from someone like that, who most likely has made a string of wild accusations over the last few years.?
A couple of years back I was approached by a "busy body" in a quite little village which had a no cold calling policy she raged at me how dare I clean here, there was a windy already and I had no right to be in the village and I had knocked on her door 3 times in the last 3 months, she stomped off and I presume made all the phone calls she felt she needed to make, despite me having cleaned in the village for 2 years and all my customers being recommendations, I'd never needed to canvass there.
Never heard a dicky bird from either the police, trading standards, local council, I didn't expect to hear from the village councillor as she was my first and best customer I had 😃
In short, don't sweat it
Darran