No feedback from Cell C. AGAIN!!!!!

I've upgraded start of May. By the 20th May I never received my device. I phoned in and canceled my upgrade. It was done. Lady at retentions said I could stay on for R30 pm so they won't loose me as a customer. I agreed. Now I get billed R801 instead of my normal R 320. I've phoned in numerous times. I very got a case and ref nr. Nothing happens. Every time I call in they say it will be escalated. Nothing happens. It's like speaking to a wall. I'm frustrated and don't know what to do anymore. I was promised that Maropeng would call me. He called me and said he will call back Thursday morning. It's now Friday afternoon and nothing yet. PLEASE!! IS THERE ANY ONE AT CELL C CAPABLE OF GIVING ME FEEDBACK?????????? IT'S NOT NORMAL USING HELLO PETER AS A COMMUNICATION TOOL BECAUSE CELL C CAN'T GIVE FEEDBACK.