Do you still have access to your Lifemiles account?
If yes log in, go to 'your LifeMiles' and then 'Print receipts'. There you have a List with all your transactions and can view the receipt of it.
If no... bigger problem... Maybe might be easier to find out the ticket no with the help of AC... They should be able to purge your PNR (from the past) with fligth no, date and name... good luck!
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Just to add / explain. If the date of departure of the booking already passed, the booking can't be retreived anymore, using the PNR. But the ticket number can be opened also after the date of the flights (up to one year). Therefore TA/AV wanted your ticket no. Also TA/AV can purge your PNR using flight no, date and name (if they want)...
Last edited by Air Rarotonga; Aug 27, 2013 at 1:02 pm