I don't think you've proven they lied. The wiki page says they have a "plant" in the US and are expanding it (i.e., implies continued use). Your only rationale for them being Chinese manufactured is that they'd cost too much if made in the US. But, businesses spread costs all the time. If they make A in Malaysia, B in China, C in Canada... those are often priced the same, attributing labor cost as a general expenditure -- not tied to the specific cost of making a specific item which must be recouped specifically from its purchase.
I agree with captain. A51 has demonstrated they're not one of the "secret sauce" brands. I think they would have deserved the respect of contacting them directly to discuss it. Jumping to "I caught them in a lie" isn't cool. If that's related to your injury, I don't know.
(If it was Lush, Kind, HydroGrowLED, California Lightworks, GrowBlu, Blackdog, then I could see making assumptions. Those guys aren't very transparent. Haven't earned a degree of respect.).