Shocking service - Glocell (Cell C)

Good day I have a complaint regarding the service or lack of service from Glocell. I have being +- 13 years with Autopage but last year Autopage was taken over by Glocell. I received a call confirm I can upgrade and when ahead with upgrade beginning of November 2017 they said delivery will be withing 4 weeks, I've called a number of times and they said it has being shipped and is on its way. No one has contacted me since the 1st call when I upgraded, I've been to the Glocell shop in Cape Gate, just for them to say : They don't do upgrades anymore everything is handled by the call centre. He called the call centre and they said they will contact Mr Pretorius immediately that was the 26th of December 2017, today is 2nd January 2018 and we still have not received any call from anyone. I called the call centre 4 x today again I am in a queue and get to next in the queue then get cut off. (4 X) I just want to say that this is poor and shocking service, and if I do no get promising feedback by Friday 5th January 2018 I will be cancelling my contract with Cell C and Glocell.