What's a minimum cc's of fat should be transfer for Brazilian Butt Lift? (photos)

Just wandering what should be the minimum amount t of fat transfered into buttox to see difference. I had bbl done and see zero results. It was big right after the surgery but now I know it was the swelling. It's been almost three months. I wanted a butt. I don't understand what I paid for. Attached is before and after pic. Please be the judge. Thanks for your input!