Gravely disappointed in MTN

I'm soooo disappointed in MTN. I canceled my month-to-month data contract in April. I called and I was told that it had expired and I requested that it NOT be renewed!! The lady I spoke to indicated that it had been canceled. In May I was surprised to receive data eventhough I had canceled. They deducted from my account. I sent an email to customercare requesting cancelation and indicated that I canceled in April. I did not get any confirmation after sending the information they requested. I even indicated that should they deduct in June I'm going to reverse. They then terminated the data on my number but INSTEAD they transferred it to my son's number. I did NOT authorise for that to happen. They still deducted from my account. A lady named Noloyiso Blayi responded to my email saying I must wait another 30 days because the data is on a different number. I've been waiting since April for this cancelation!!! Why should I wait another 30 days when I didn't authorise for them to load the data elsewhere. I want MTN to cancel immediately!! This is month-to-month contact and there shouldn't be hassles in cancelation. I'm so disappointed in their service. I've been a customer for more than 10 years and this is how I get treat!!?? Cancel it immediately