I unfortunately booked my dates wrong. On request if they could refund the first night we didn't sleep - they just said no it's too late. I submitted a partial refund request via AirBNB which they denied.
We needed to stay another night longer, and I requested if we could not use the first night's money - but no - I had to pay again for an additional night at higher rates for 1 night's stay.
So be sure when you make your booking as it seems they are just there to make more money where they can.