Why is it so difficult to get points / elite nights credited to account?

I’m currently traveling for work, spending up to 250 nights a year at Marriott hotels. Recently my family came to visit me and I booked a number of rooms for a long weekend, all in my name, all with my Bonvoy number attached, all paid for by me. It’s been 3 weeks since everyone checked out and flew back home, and I still have no record of the extra rooms and points and elite nights in my transaction history. I’m literally missing 16 nights and the corresponding points and status change. I’ve reached out to Bonvoy and they’re “investigating”. Meanwhile, my Bonvoy account is still missing the nights and points.

Update! 😊😊😊 I got the nights and points credited to my account for the room that I stayed in. I got points for the other rooms. I also got 10,000 additional points as an apology for this inconvenience! All good now! Thanks all!!!