I'm exactly the same! I've lost about £500!! I don't want to cancel these people now but not happy that Airbnb have given a massive discount! Not explained well at all!
I had to cancel my stays it was way too much. They set the price for my stays too low to begin with then they have gave a discount to where I was pretty much giving away my home.
It is very important that you become familiar with Airbnb's policies and process, and how to quickly find them. First, you should always reference the Airbnb Help Center: https://www.airbnb.com/help?audience=home_host (the UK versions is https://www.airbnb.co.uk/help?audience=home_host). When I cannot easily find a topic, I noticed thatby doing a Google search of a question will often have the appropriate Help Center page in the results. Secondly, search from answers and information from previous thread here in the Community Center, by using the search field at the top of the page. Trust me, your question has been asked several times. If you still need more information or assistance, call Airbnb customer service. I found this list of numbers by doing a simple Google search: https://airbnb.pissedconsumer.com/customer-service.html.