I do kind of wonder how you go about pushing against a company that has virtually no customer support. Just an AI chatbot or something. No numbers, no emails. It’s not common, but I’ve seen it, and I expect we’ll see more of it increasingly. I suppose at that point you could try to locate their address and mail them a letter?

EDIT: Btw both mastercard and visa DO have simple ways of contacting them. You can email mastercard and Visa has chat, email, and phone call. It was pretty easy to snap off an email to both calling them out. About as hard as signing the petition so I recommend doing that instead.