MTN - THE WORLDS WORST COMMUNICATIONS COMPANY

In August I went to a MTN store to cancel a contract that had ended a few months ago. A few days later I received my invoice, but the contract was still active. I called the call center to cancel the contract. They confirmed that the contract was cancelled but because it was done before the invoice date it would still reflect i received a reference number for this call. They gave me the amount to pay. Before payment i called the call center again, once again i have a reference number, they to confirmed the amount to be paid, which i did. A few days later my phone was suspended. I called and they told me that i have an outstanding balance :-(