Cancellation nightmare

Hi, I took out a contract with MTN 2 years ago, which expired 07.06.2022. On the 26.05.2022 I submitted my cancellation letter to customercare. In June I was phoned by a consultant and we confirmed the cancellation. They kept on deducting the money from my account, so I phoned them again to today. All of a sudden there is no record of my cancellation nor my phone with the consultant. Can you believe it??