Cell C is a ***** and have useless and stupid agents

ON the 21 of August someone whom I believe is from cell c requested an upgrade on my behalf, luckily I received an SMS stating that my upgrade was successful I then contacted Cell C to inform them that I did not request an upgrade. I was then told that they will look into this and let me know. On Monday the 24, I received a call from one of their stupid agents to ask me if I received the phone in good condition when I asked what phone she couldn't give me an answer I then asked her to whom did they deliver the phone too, then she gave me a lame explanation that they had emailed the Currie service not to deliver the phone as she can see that I had told them that I did not request the upgrade.

Then they told me that they will reverse the upgrade then when my bill came it was more than what I usually pay them. I contacted them again to ask what was happening then I was told a credit will be app**** to my account so I shouldn't worry. i was then debited the wrong amount I followed up with them since the 21 of August, then September now its October but my issue hasn't been resolved. and calling the call center is just a waste of time they are useless and stupid. my next step is to try and go to a shop and close all contacts I have with them because this is tiring