Can I sue a big company due to a product put on the market that they claimed was for people of all races. The product did not work on dark skin.

The product is a smart watch that takes a BPM reading. It seems to use some type of laser to penetrate the skin until it reads a pulse. It did not work for dark skinned black people. White or fair skinned people had no problems. I exchanged it for a new unit, but had the same problems. Their Tech dept. denied any such issue existed. They insisted that the watch works for all skin. I sent more emails up the chain and got no acknowledgment on this issue. Corporate level: my voice mail and emails were never replied to, even though I was promised by a lower level supervisor that corporate will contact me. I have the watch, my emails, and video evidence of their smart watch only working on the fair skinned. I believe that someone high up at the company saw at least one of my complaints or even saw the video, as days later my watch received a software update that helped the problem. 2 months now and no acknowledgement. It is as if they figure I will just go away.