The roof blew off our rental car, what can we do?

We rented a car in Florida and drove it in a rain storm and 50 to 60 mile hour winds. The car has a soft top, it was coming off, it was damaged, we could not get it latched and we were holding it down. I was actually driving with my knees. My wife had shoulder surgery about 16 months ago and has arm aches. We are very lucky we didn’t kill someone, blew the back window out. The roof was broken before we even took it but they should have checked all of this. It was very scary, the roof was teetering going down highway, we made it to an airport, they gave us another vehicle but we made the report they know it was their fault. My wife was crying, the suit cases got soaked, my wife’s arm hurts from holding down the roof for 20 miles.