Cell C will not help with a cancelled contract which they messed up

When will Cell C train their staff to realize when you call in that they are talking to a customer who PAYS their salaries. I have been struggling for months to sort out a problem. I have discovered that the supervisor I spoke to on the 28/09/2018 was from Durban. His name is JAYDEN LAURENCE. He promised that he would sort out a debit order for R240-00 which should have removed as the contract had been converted to prepaid, but someone had not done their job (not unusual) and did NOT have the contract amount of R240-00 reversed. I spoke to Charlan Aiyer. He said he would speak to JAYDEN LAURENCE. He obviously didn't. All my calls on my cell phone are recorded so I have all my calls to Cell C. If anybody heard them would cancel their dealings with Cell C. PLEASE HELP. The contract is in my wife's name but I have power to act for my wife.