Booking.com bad refund process

I have made a booking for accomodation on booking.com 1st I was told the apartment I have booked is full untill next year but by then no money was deducted from my account.

Then i sourced for alternative accommodation, got alternative accommodation on booking.com and paid over a R1000 for one nights stay. The owner then sends me a email to let me know they're overbooked and cannot accommodate me. For the last 24 hours I have been struggling to get my money back from booking.com . I have explained to them I need to get my money back within 24 hours and they told me if I do not have extra cash to book another place they cannot help me as they will only be able to refund me in 15 days... (keep in mind my stay is supposed to be in 4 days time)

So now here I am not knowing what to do have to cancel my plans because they cannot refund me immediately but my money was taken within half a second..