MTN continues to exploit their clients

I took a phone contract 2 years back. it came to an end this year March. I called ahead of the end date after a lot of back & forth I was told (by Sumane an MTN official) I cant inform them that I don't want to continue with the contract before in ends. I must wait for the end date.I called again a day or 2 after the date and Nandipha Ketsekile said I was incorrectly advised by her colleagues. He should have inputed that on the system. She gave me her direct email as she was going to investigate and revert. She has been ghosting me since and guess what? They continue to deduct contract fees from me of even after efforts to informed them that when the end date of my contract comes they must stop deductions.