Airbnb is a ****

I booked accommodation through Airbnb and I received a confirmation after making the payment and a few minutes later the host called me to say it looks like there is a double booking for those confirmed dates and she requested me to cancel, but I decided to find out from Airbnb. I received a response from them and apparently I am going to have to wait for 15 business days in order for me to get a refund although their host cancelled my booking. What frustrates me the most is that how am I supposed to continue and book other places if I am Only getting my refund after 15 days, pls don't use Airbnb it is a ****.