Very sorry to hear this.
I would locate the owner, if necessary, through the name of their business as registered with the state of Florida. I would contact him /her directly and see if you can resolve (unlikely). I don't recall where you're located, but your best bet will probably be small claims court though that has a $5k limit. From there, you'll have to settle for a pound of flesh via interest reviews on Yelp, Google, etc. Just know that when you trash the business, the owner will reply that it was your fault, didn't read the agreement, boat was a mess, etc. So pre-empt it in your review.
Good luck
Peter