I also had my phone stolen a few years ago, and, like your case, the thief used the phone to call someone. Since the police are useless (even though the number the thief called was right there on my bill), and since I received very little help from the person at that phone number, I stooped to the very lowest level I could: I called that number every night that I was up late, every time I got up to use the bathroom in the middle of the night, and every time I had to be up super-early for several weeks. It didnt make my phone come home (or any of the other crap that this jackass stole) and I didnt expect it to, but it made me feel a little better that I was torturing someone that the thief knew. Maybe that person on the other end of the phone passed the message along to the thief: your actions impact more than just you.
If the thief used my phone and misdialed, well then whoever you are: Im sorry.
Try not. Do, or do not. There is no try.