Horrible customer service

Horrible customer service that led to me paying for an additional 4 odd months. I had a 24month data contract with Vodacom. After the 2 years were up I was still charged on the contract. I contacted them to ask why I am still billed for the contract and they had some fine print story that the contract continues on a month to month basis until I decide to cancel. I then asked them to cancel the contract. I was told that there is a 7 day turnover on these types of issues and I will be receiving a letter of cancellation as soon as the contract was cancelled. Thinking it was over and done with I did not put in extra effort to make sure that they do their jobs and I get the cancellation letter. After the month passed they debited the amount for that contract again. I immediately phoned in to ask how and why. The consultant that I was then dealing with told me that the contract was not yet cancelled and there was no record of any queries being logged on the account. After asking the questions and being sent from one department to the next I excepted their pathetic excuses and asked again for the contract to be cancelled. I then kept an eye out for an email on cancellations from them and after the 7 days, there was still no letter. I again phoned them, spending another hour being sent from one department to the next, and again the account was not cancelled. This time luckily there were 2, out of the 6 tickets I have an SMS for, showing on their system. I asked the consultant to please read what the previous person wrote for the ticket and sure enough, the first ticket stated that the contract must be cancelled, but again it was not. The next ticket, that was logged a week after, also stated a cancellation. I then asked why it is not being cancelled and why I am receiving messages that my account will be debited for both contracts again? the *********** person from customer service had no idea what is going on in her job and I eventually got her to send me on to the cancellation and retention, there I spoke to another lady that was a bit more helpful. she informed me that the contract has indeed been cancelled and she sent me the cancellation letter. The letter stated early cancellation but at least no further payment was due. I have now received more messages that the account is going to be debited with the amount of both the contracts. I have no idea who else to call or if there is someone that can help with this dispute because phoning the customer helpline is a joke. I will, however, lower the debit amount with my bank to pay only the one contract.