The parcel lockers at Officeworks were for their own delivery service, not for Australia Post. I use Parcel Collect because I got sick of parcels being stolen. Apparently we recently got parcel lockers at both 7 Elevens. Even though 7 Eleven is closer than the PO, I'll still probably keep using the parcel collect. It allows me more time should I not be able to get to the PO straight away.

I think you have 21 days to collect with parcel collect. Even then, my PO said they'd never return a parcel of mine, because they know me, know what I do for a living, and know I'll get there eventually.