Your xh sounds a bit like mine. LOL! I use to get calls at my residence while I was working and it was songs that I hadn't heard in a long time describing how people feel, etc. Of course, he denied everything, but who else would have our unlisted/unpublished number? I certainly didn't give it out.
I think my xh wanted me to contact him about his health. I knew he wasn't sick from all that I had been seeing all over the internet. Yes, they truly do weird things, just like kids would do. After a while, you'll find the humor in what they are doing. They are very transparent after a while.
Hang in there and try to find one thing to laugh about each day. Laughter is the best medicine around town.
Sit quietly, the answers will reveal themselves when you least expect them to. The past is gone, the present is a gift and you need to focus on today, allow the future to reveal itself when it is ready.