pathetic customer service received from Vodacom online upgrades as well as customer services

i would not even give you guys a rating , but unfortunately , there is no option to select none , firstly i had done an online upgrade with vodacom , realizing i had selected the incorrect package i had opted for it to be cancel which it didnt allow , i called the call centre numerous times which they promised to return my call but never did , waited on the line for around about 1hour and 30 minutes to no avail , realising that nothing can be done i decided to send an email , no reposne has been over a week the device arrived i told the courier to please take it back as i do no need it and requested for it to be cancel i then visited two different branched which tried to assist me however they had no luck with the call centre themselves , i am tired and want the upgrade cancelled on the system with immediate effect !!!!!!!!!!!!someone please help cancelling an online upgrade as it still reflects that the upgrade has been finalized .