Perhaps it is due to your location or a lack of drivers near you. You say they need to pick it up from central chch, but isn't that pretty empty these days, and that could be the reason why they don't have anyone to pick up in that zone.
My location should not have been an issue, ?while I was waiting I saw Poste Haste deliver to the school which is about 50 metres from me, ?I saw a Castle Parcels van drive past and I even spoke to a Poste Haste driver who had parked nearby to have his lunch, ?but no he could not do my pick up as the job had not been allocated to him and I'd had a NZ Couriers delivery. ?
Bear in mind that Pass the Parcel are all in the same group as Poste Haste, Castle Parcels & NZ Couriers and they use which ever vehicle is nearest, ?I was advised of this by one of their customer service officers.
The original delivery of the satchels was made by Castle Parcel and the eventual pick-up was done by a Poste Haste ?uniformed driver in a plain white van.
Sounds like they might have bug in their systems, as that shows a lack of efficiency with their software. There systems should be more efficient. I think most couriers will probably say 'up to 2 days' to pick up but I am sure that is pretty rare, but would happen from time to time.