Something doesn't sound right here.Emotional wording in thread title. Yes someone else ripped me off via Jetstar. I will definitely follow up with QFF using the fraud term to get their attention. It has definitely been difficult. Given that it has been over a year since the original loss of points I'm sure the flight has been taken. Yes, you would think if QFF had been willing to look into it when I first reported it, it would have been easy to track down the individual involved.
A call to Qantas frequent flyeris as simple as: 'in July 2018 there is a points deduction for a flight I didn't take, or book for anyone else'.
Qantas will then investigate. You may be asked for a stat dec or other evidence.
Maybe it was confusing for Qantas if you mentioned the points were used to upgrade to business class as this is not possible. For jetstar awards you either buy economy or business. You cannot upgrade. In that sense Qantas ikely assumed you wanted to upgrade your existing booking to business class, and referred you to jetstar.