@Teresa322, sorry to hear that.
I can understand how you must have felt that night. I had one guest, where I did not dare to fall asleep before he gave up texting after 2am and I was worrying, if I would be faster out the back door than he through my glassframed separation door.
When you say, airbnb wants you to contact him, what was required for that? I would suppose it was only necessary to send a refund request through the resolution center. You could send a simple message. "After your departure, we found the following items missing or damaged. Item 1 missing, price xx, item 2 damaged, repair costs estimated / replacement price xx etc etc Total price xy. Please confirm the refund!"
And after you did that, you click on airbnb involvment and upload the police report, photos and cost estimates for the items you want money for. Those can be pdf printouts from websites selling the items.
I believe it's not necessary, that you contact him with any private word on any means of communication outside the single resolution center message. It's like writing and invoice. The resolution process is very formalised, I used it a few times, once with a big damage, where airbnb suggested we stop direct contact, and a few times for refunds, postage for forgotten items changed stays etc. Even if nice guests, there is not much contact in the process. A nicer greeting maybe, but it's a billing procedure, that's cold in all cases.
You have now a bit longer to do it, maybe 2 weeks, so if the time is not up yet, you can still try.
I had a mentally instable person in a computer training once, who had to be removed from class by police and with wardens who brought a straight jacket. She went willing at the end. Luckily, the training center had a psychologist on site.
But a few weeks later, she was back from hospital and ended up in my next class. Under medication, that was another person and she worried more about me than I about her. I guess I was prouder than she was, when she passed the final examen rather well.
Just to tell you: it may well be, that your guest has not much recollection of the event and feels very ashamed.