OK.
So all your flights were EK flight numbers (EK marketed) on EK & QF aircraft (operated)?
Or your flights were EK and QF flight numbers (EK & QF marketed) on EK & QF aircraft (operated) on different legs?
You may need look at the reservation when bought
With QF you can only claim up to 30 days before join date.
If EK given you 6 months retro claim before joining the EK ffp thats good.