Pathetic Customer Service from *********** Staff & Management- Vodacom

I am really disgusted by the customer service and incompetency of the Vodacom staff from *********** consultants to *********** management. I requested an early settlement at the beginning of this year, which I received and settled immediately and forwarded the signed document and proof of payment. The very same month I was debited, which I was comfortable with and was assured by your *********** staff that this was the last debit and the account has been cancelled and moved to prepaid. I then noticed that I was still on contract after a few days and called your *********** contact centre and was assured again that the contract has been cancelled and the number will be moved to prepaid. Again end of March I get a debit for an amount more than what I normally paid, called your *********** call centre again and spoke to a consultant who thought she was the CEO of Vodacom and R500 meant nothing to her and eacalated to a manager who assured me that I was correct after listening to the all calls and assured me that a refund will take place and sent me a reference number and now when I call to follow up I’m told that there is no refund due, can somebody tell me what the hell is going on, I want this resolved immediately and refunded and all amounts taken off from the *********** consultants that failed to action the cancelation. I also want a copy of all the calls so I can take this matter further externally and claim back against Vodacom.