MTN incompetence and thievery

I have been trying to cancel my yellowtail contract for over a year with no success and much frustration. I have tried the call Centre with no luck. Went to a store and they cancelled it in front of me, but I was still debited. Tried online again recently and finally got a person who emailed me and confirmed it was cancelled in May. Then in June I was debited again so I contacted her and she said it was the last debit. I am so tired of this and wanted it over so accepted it. Turns out it was just another lie as I was debited again today. When I contacted her she said it was cancelled on their side and I must provide proof. So now it is my fault?! I have also consistently asked for refunds as they must have proof on their system that it was cancelled more than a year ago. This request is ignored in each email response. They are *****, *********, ****s and *******. Worst company ever. But why am I not surprised . So very sad.