I don't care if you believe me or not. If my partner confirms that the programmers didn't get your notes from us, you'll be paid nothing. If it shows up that the programmers had got your "bug analyse", you'll be paid like agreed.
Also your notes were very general, more like a notices..
Regardless, He let you know and you obviously didn't know. anyway You should have sent an email to all members who bought (I know you have this information, As I am a previous buyer and receive cointoli updates every so often). You should have alerted them of this issue, because you didn't you obviously didn't know.
You are liable to pay, if you did know already and didn't tell people, I believe you are even more liable to pay. Either way... You lose this case.