I'm preparing to sue booking.com

I booked the place with a confirmation number, and the money was taken out from my accounts 4 days before. I got to the guest house, only to find out they were overbooked. I called the owner, and he said I should contact Booking.com. i was waiting outside the guest house, trying to get in contact with the booking .com and I saw a REFUND of my money back. It was almost 11pm. I had a 1-year-old, 7, 8, 14, and 15 years traveling with me. How could you refund my money after driving all the way from Virginia? They will hear from my attorney.