Cell C treats customer like dirt

Called in Thursday 9/5 to get upgrade. Guy needs to check credit score and promises to call Friday @ 2pm. No call. I call again and thought I might get better service if I suggested that I am considering to cancel my contract. Backfired on me, the call centre person did not even TRY to change my mind and was immediately ready to assist me with cancellation . I litterally had to BEG him to at least **** enough interest in trying to keep my business and assist me. Got more promisses from him and here I am now, still being ignored. Called again today 13/5 and they are still not interested to assist. Is Cell C really not interested in my business? Just need a straight answer so I can finally move on. And just to make things clear, if I happen not to be able to take your call, will you try again? No, I actually know the answer to that. I am really disappointed in Cell C. How is it ok to treat a customer with such utter disregard.