Bookings.com are ****mers

I booked at Imvubu guest house and conference centre in Westville through booking.com, my booking was for 2weeks from 25th of May to 5 June, money was debited same time from my account and the booking was confirmed, I went to check in yesterday afternoon (on the 25th of May) the lady at reception called the “owners” of the place and they told me there has been a change of management and they have no record of my booking, the previous owners have not removed the guest house from bookings and unfortunately they can not help or offer accomodation.. how is that my business when I had paid in full? I paid through bookings.com and I have proof, so please I need my refund, the economy is tough for everyone and it’s not fair that we have to be ****med like this, I have used bookings.com countless times and I have never had any issues except for this time.. I had to get another place at last minute and had to pay out of pocket for the new accomodation.. to say I am livid is an understatement!!!!!