Try filing a report with the FTC. Probably won’t get you anywhere but it might help.
Also blow up the predator hunting FB groups and make sure you’re clear that your son bought it new for you as a gift because your original post here wasn’t clear about that, it seemed as if it was purchased used from someone else.
If your son bought it new for you as a gift then they should be standing behind it, period. You might also try calling the dealer it was purchased from because they often have better pull with the manufacturers especially if they’re a larger volume dealer.
If that doesn’t work you can always file a lawsuit in small claims court. That’s the route I’d go.