Can’t find him

First time poster. I am new to all of this. Thankful for AlAnon. My 23 (my Q) son admitted himself into an out of state inpatient rehab over a month ago. Even though he signed release of information, we have had very little updates. A couple days ago he called and said that he was going to go to a PHP if he could find his ID since he needed it to get on the plane. It seems he lost his ID when he flew to the inpatient rehab over a month ago. This morning we get a call from the PHP that he had missed his flight and they can’t find him. We called the inpatient rehab place where he was at and no one seems to know if he got on the plane in the first place. His phone is not working because he didn’t pay his bill. This is the second inpatient rehab since March. We let him live with us after his first rehab. We kicked him out in October. He stayed with a friend until he was kicked out an over a month ago. I want to fix all this but I absolutely know I can’t. Only my son can.