Worst courier company

I was expecting a parcel on the 23rd January, it was a non delivery as I track it from their site. I then called them to make corrections of the address, and their agent who was assisting me made those changes and indicated that I should call vodacom to approve change of that address, which they immediately did. Today when I check their system, the address was changed on their system. 10 am the update was that the parcel is non delivery because of the address. I called their customer service, which you need to hold for 30 minutes, only to be told **** by their agent on turnaroud time. Why was the parcel issued for delivery this morning if the address was still incorrect. I wont encourage their service to anyone, they could not even correct the contact details on their system as I gave them my correct contact so that their always lost corrier guys to contact me at. I normally receives parcels from other courier companies to the same address without a hiccup.