Over charged and poor service

Cell C is a **** and their customer service is horrible. Their call center agents are the worse, they are disrespectful and have stinking attitude especially Silindile Mkhwa****. I have a data contract with cell c and in October I received an airtime that I didn’t request and I called to enquire about and have it reversed. The agent who was assisting me said I can use the airtime and I won’t be charge and the call was recorded by cell c. I was still unease and I called again after few days and the second consultant said the same thing. December I was billed for that airtime and I have been calling them ever since. They open the investigation and tell me they will call and they don’t. They close the investigation without giving me feedback and I have to call again and open another investigation because they won’t know why I was never contacted or why it was closed. Today I called again and Silindile/Slindile Mkwa**** was assigned to help me and she didn’t instead she was shouting, rude and disrespectful and when I asked her to transfer me to someone who can assist or her manager she told me she can’t do that when I told her that and then she put me on hold for more than 20 minutes and then ended the call. She didn’t even call back. I’m tired of Cell C now and I want my money back!!! I have been asking them to listen to my call recording to confirm my statement but they don’t and ignore that. I can’t stand this poor service anymore.