My 2 cents

I think you're liable to be hosed on the rod and reel. You can sue them all you want, and you might get a judgement to collect. Their website shows them in California. You got the time and money to hunt them down? An attorney is going to cost you $100/hr, or more, and there is no assurance that you'll get attorney's fees in any judgement.

Further, their website says, in the FAQ: "5. What class white water do you suggest?
These boats rated for lake use only, except for the River Tamer. It may be used on rivers with some white water. It also depends on the person using the boat and their ability level."

If you have the river tamer (can't remember if you said), maybe you have a leg to stand on. Otherwise, I suspect they're liable to tell you to take a flying casual sexual adventure.

Not saying I agree, just telling you what I think your chances are.

And, as with the others, I'm glad you got out of it healthy enough to be righteously pissed off. Be thankful, for at least a minute.