If I cannot sell them, what should I do?

Put it down to experience.
The first lesson is, dont involve yourself with people who publish unachievable returns.
The second lesson is, if a company replies to standard business info requests, and/or requests to justify said unachievable returns, in the manner that Banx does (threats, dismissiveness, not answered, victim mentality, doxing, etc.).......run for the hills.
The third lesson, is to understand the above two lessons.