As already suggested, phone the Call Centre so as they can submit a request through the oneworld desk for the flights to be reinstated.
QR fights are known to drop off if not ticketed within 24-48 hours.
No luck. I'm extremely frustrated with myself for allowing this to happen. I should never have allowed the agent off the phone on Saturday once the ticket numbers for the original flights dropped off.
I phoned this morning and after holding for ~90 minutes I got an
extremely helpful and empathetic agent. He was of the opinion the agent should have known the flights would disappear if not re-ticketed with Qatar. Nonetheless he has submitted a reinstatement request with QR - in his experience, though, these are almost always unsuccessful with no status. Apparently, most of the time QR don't even respond to the reinstatement requests.
The extremely helpful agent spent ~40 minutes looking for alternative routes home. We searched ZRH/FCO/MXP via DOH/DXB to KUL/BKK etc +/- 3 days of the original flights
Finally we found award seats in J on QR MXP-DOH-BKK. It's a couple of days out from our original dates. Points and taxes have already been charged, I'm just waiting on ticketing numbers to come through. All in all it's a much better outcome than what I had expected to occur today.
edit: Will save double posting and update here - 6 hours later and new flights still not ticketed. Phoned up, got an SA Agent, she said there was a note on the booking - ticketing dept didn't ticket the flights as they appear to be duplicates (of the now cancelled, non-ticketed booking?!!). Seriously, can these departments do anything right at the moment? Explained situation to SA Agent in that these new flights are absolutely not duplicates and implored her to have them ticketed whilst I was on the phone. It took some coercing but I eventually got placed on hold for 40 minutes and had the flights ticketed whilst I was on the call