Horrible customer experience

I am very disappointed at the poor and unprofessional service I have recently received from booking.com. I have been using this website for quite some te. I have recently booked an accommodation at 17 montego in Port Edward. Instead of receiving a confirmation. I have received an email stating that my booking could not be confirmed and that my money will be refunded in 7 days. Do these people even understand that I need my money for holidays? If they can't give me accommodation of which I don't understand why, because the place was available when I booked it. I am very upset and angry that they can't give me accommodation and also they don't want to pay my money back so I can book another accommodation. This is a nightmare and this is going to ruin my holidays