MTN is the most *********** company in SA

[***] On 1 July 2021 I cancelled my data contract with MTN. I called the call center and spoke to an operator. At the end of the call the operator confirmed that my contract was cancelled and I did not have to do anything else. Yesterday MTN debited my bank account double for July and August. I inquired and MTN informed me that it was for the data contract that I had with them. Why did I have a 12min conversation with their operator at 9:07 on 1 July 2021 if they did not cancel the contract?? Do MTN pay their call center operators to chat with people for NOTHING?? I emailed their retention department as I was informed to do and I had no reply yet. They are so quick to ***** my money, but NO effort to solve a problem that THEY created. MTN is pathetic and I will NEVER support them again.