Should I take this guy to court?

Back in 2016 I took two necklaces to our local jeweler. One was a vintage bead necklace that my ex’s mom gave me. It was probably from the 30s. At one point it broke and I collected up all the beads against the day I could get it restrung.
The other was a necklace that my mom gave me back in the 80s for my birthday. It was unique. It advertised “fresh water pearl,” but the “beads” weren’t round at all. The beads were long and wavy. The were probably plastic and not pearl at all but I liked it.
I had this idea of having the jeweler string them into one necklace that I wanted to give my grand daughter on her 16th birthday….
Keep in mind I took it in in 2016. I’d go in to check on them once in a while, but it was never done. He’d always say “I’ll work on it this week.”
It’s been 4 freaking years so I finally got a little pissed off!! Then he produced this Gawd awful, fugly crappy necklace and tried to convince me it was mine. I said it was NOT mine. He said it was because it was in that zip lock bag with a card that hand my name on it, in my hand writing, and the date. He had obviously taken my card out of my necklaces and put it with that one. We actually got into an argument over whether or not that was my necklace! So I left with his promise to find my necklaces. That was about 4 months ago.
I went back in today with a necklace that was similar to the vintage one. He kept asking if that was THE necklace. I kept saying, “No, it’s just similar, so you’ll have an idea of what your looking for.”
Then guess what he did…he came up with the SAME damn zip lock bag, with the same fugly necklace and we again argued over whether or not it was my necklace!! It was like a bad deja vu.
I want my necklaces back. Should I maybe take a cop in with me and ask if I can look through his inventory?
He’s pretty old, BTW. In his 80s, at least.