Airbnb Booking and Reservation Issues: Can They Make Mistakes?

It’s not my first time using Airbnb. So far our first experiences have been great so we decided to use it and tried looking for a place in San Francisco. Upon checking I tried to ask some questions from 2-3 different hosts, e.g. how far their places are from downtown since it was my first time visiting. Anyway, I tried to check the dates and I’m sure that I just wanted to hold them for our reservation. I was just surprised that after a couple of days both bookings had been made and our debit card was charged. The first one was fine and I got a full refund less the Airbnb fees, but for the second one, which was more expensive, the host refunded only 50% of our payment. I tried to ask for some consideration since Airbnb’s policy states the host has the discretion of refunding the full amount since it had only been one or not even one day after they confirmed the reservation without my knowledge. Now I am trying to contact Airbnb but I have had to wait 72 hours for their replies. I have a valid reason for getting a full refund. Someone in the family just died and I hope and appreciate that someone can help me on this matter. For some people it might be a small amount of money but for me and our family and as a single parent almost $400 dollars is a huge amount for us to lose. I would appreciate if someone could at least help me resolve this issue as soon as possible. Below are some of the conversations. I have a lot of photos showing that I didn’t book the properties; I got a pre-approval (e.g. 1:39 but on the same date they charged my card as well). Thank you very much.