How can I get a full refund?

[Janeth Torres]

I booked a home in Florida via Vrbo when I got there at midnight there was cars parked there so I knocked just to make sure and a woman opened the door and she said she booked the home the same weekend as me except she booked for more days. Since it was already midnight I just messaged the host & didn’t get a reply til like 2-3 days later ( Btw I had to get 3 hotels for my family) I paid a total of $1,608 but the host said they can only refund $1,195 how can I get a full refund it’s not my fault they doble booked