@Jacob52, sorry you have not gotten adequate support and explanation from Airbnb about this. We fellow hosts can only give you limited advice, as we are not able to see the reservation form in question, the confirmed booking, the notice of payment, etc... so all I can advise you to do is contact Airbnb again, not via email but by calling them or by twitter.@airbnbhelp . they answer fast. have the confirmation number ready.
Also, when you look around just a bit, by googling Contact Airbnb or by finding the community guide on how to contact Airbnb ( use the search function here) , and especially educating yourself about the ins and outs about Airbnb rules and how it functions, then you might not be so quick to call them robbers. I never ever had a problem getting paid on time by Airnb, and there always is plenty of communication going on when to expect payment, etc..and like @Branka-and-Silvia0 said, the booking only gets confirmed by Airbnb when the payment is secured. Did you perhaps let those people in without a confirmed booking?
I also saw on your listing that you had a cancellation in early February. Do you know that carries penalties? Usually Airbnb subtracts that amount from the next booking a host has, so perhaps that penalty amount got subtracted from the rental amount you are expecting.