This guy sounds like "if you say anything bad about bitcoin, i will give you a bad rating, mimimimi". I am sorry, but this is unprofessional.
The fact is that you tried to sell a useless program that simply did not work, while promoting it with fake arguments that could be explained only by a) a total lack of understanding of basic cryptography, or b) malice.
Now please prove you can generate multiple valid signatures for the messages + public keys posted above.