I wouldn't bother contacting Samsung. You'll get an anodyne boilerplate reply. I suspect we'll also be required (or at least be easiest) for each person to submit their own claim as pursuing class action probably more difficult. I ended up not pursuing as the hassle to chase whatever I paid didn't seem worth it in the end. That I said I feel strongly about corporate injustice so might just be bloody minded enough to pursue.
The irony is Samsung Pay lost now and miles away from Google Pay