Horrible service with premature contract cancellations and staff competency

I am horrified at the service I have been receiving from Vodacom. On Monday the 27th of November I paid more then R8000.00 to buy out the remainder of my contract. I am immigrating and cannot have an open and unpaid contract, as I will not be here or able to pay. I sent all the required documents, as per the instructions on the invoice that they sent me and sent them the proof of payment within the hour. It is now 4 days later and my contract has still not been cancelled. I have made 7 calls to the contract cancelations devision to no avail. Every agent tells me a different story and some put down the phone in my ear. Some can see that the money reflects and promises every day that the contract will be cancelled by the end of the day. Others say that the money doesn't reflect at all. I have now re-sent the proof of payment to one of the agent's supervisors and am still waiting to hear back. It doesn't seem like anyone at the call center knows what they are doing, while I just payed them what I owe and want the contract to be cancelled, as their mandate states. I am disgusted that SA's most trusted cell service has come to this. I will never recommend anyone do any business with them again.