I actually do not know what I would have done or can still do differently. That's the problem. I tried offering a 14 day money back guarantee and kept the price low but that hasn't generated the type of sales I was expecting.
On the free marketing, since I have no clue what you did, I will assume you're lacking a lot similarly to your paid traffic attempt.
If you want someone to just bounce things/ideas off, hit me up, email is in the profile.