Vodacom - Over a year of disappointment

Dealing with Vodacom customer service has been an absolute pain. For the past year I've been calling them trying to sort out an error on their side. I am tired of always calling and nothing gets done to resolve the issue. This has gotten to the point where this is affecting my credit rating. Might I add, that this is for a R10 that I apparently owe.I cancelled a contract I had with them which was at that point a month to month contract as the contract period had already ended. I requested proof of the account being closed and settled, and that an update had been sent through, come to find out that still hasn't been done. This is the reason why so many of your customers will leave, myself being one of them if this isn't resolved by Monday as stated by one of your customer care consultants.