What To Do?

I started using a new tech earlier this year.  Nice man, seemed very knowledgeable about the vintage amp i took to him for repair.  After I got the piece back from him, another issue occurred, and I took the same amp back to him in early June for repair.  Since early July he has not taken any of my calls or responded to texts/e-mails asking for updates. I've been as firm as i can without being threatening and have offered to come retrieve the item unrepaired. But again, crickets for 4 months.

I spoke with the person who referred him to me, and he said that he's physically fine but just has a lot going on.

I live a little more than an hour away, so tracking him down in person is not a viable option. At this point, what should I do?  I'm thinking that filing a police report is my only option.  Would the police deal with something like this?