While the whole situation is bad, you are being hit by a case of bad customer support, not necessarily a company that does not care about security. They didn't

While the whole situation is bad, you are being hit by a case of bad customer support, not necessarily a company that does not care about security. They didn't understand your message. It's bad. But it's still reasonable to not assume the worse. Email the CEO or try to reach some developer on LinkedIn or Twitter.