I have four parcels with Courierpost at present - earliest is a pickup last Thu in Christchurch that still shows no signs of being delivered.
I have a parcel from The Warehouse picked up on Sunday from the Lower Hutt store that shows as an overnight delivery rather than economy service that shows no scans after a pickup scan by the courier - it hasn't even updated yet to show "at depot" like some of the others. You'd think it would make sense to try and at least sort local delivery goods separately.
It sounds like they've been totally swamped in orders and their processes are so broken they've made things really bad for themselves.