Very bad customer service No response back after calling the call centre 4 times…

I was called on the 10th Aug 2021 by a customer service agent from the 084135 number… requesting me to upgrade my current wifi router package …
I had then done the entire process in the fone… I was sent an sms on that day saying it’s almost approved and thereafter the guy confirmed that all has been sorted…. Only to find out that my bill at the end of the month was still the same…
So on Friday the 1st October I called the cell customer service centre spoke to a consultant explaining her all of this, and she informed me that there’s nothing on record….
I asked her to speak to a supervisor and she advised me that the supervisor will call me back by 12 midday… I was given a reference number

“Dear customer your reference number is as follows

***

Kind regards

Cell c”

To my surprise no call until Monday Morning the 4th October……
I call the centre back … I was so upset… asked to be put through a manger immediately but the ldy on the phone said hold on I’m going to put u thru to upgrades I said to her I don’t need to speak to anyone there…. However she said hold on and all of a sudden I was on hold saying I’m in the upgrade Dept… only for no one to pik up and the call dropped….
I call back and demand for a supervisor only fir one to come on the fone 15 min later… after explaining everything again for the 3rd time… and when she comes on… I can hear her clearly…. She says repeatedly I cannot hear you and I’m going to put the call down but will call back…
Well no call !!!! 😡😡😡😡😡😡😡😡😡😡
I call back at 8:53…..
Speak to another consultant and I told her my story again demanding a supervisor and she was so apologetic… keeping me on as I said no worries if I can’t I’m just going to get to a branch and cancel…
She promised I would get a call…
Took my number…. But til this mirning no response from this pathetic company…..

I’m highly distraught as I have no response nothing at all…
And they have highly *********** staff to call themselves customer service agents….

Regards
Mrs R Reddigadu