MTN won't resolve my cancelled contract query for over a year, and debitted my account long after cancellation

I've written so many reviews on MTN. I'm so glad that I am no longer with them. They are the worst of all the service providers. It's a year later and I still can't resolve my issue of them debitting my account long after I cancelled with them. Their customer service lines do not work. They offer invalid options. They pretend they will transfer you, but they just cut the line. They promise to email me statements and don't, or say they cannot retrieve them. Every department you call asks you to call another one. In store they ask you to call in to speak to retentions. Retentions asks you to speak to Accounts. You cannot actually reach Accounts. Basically no one knows how to help you and they just keep passing the buck. Do yourself a favour and switch to Vodacom, or anyone else really. Just like everyone hear on Hello Peter complaining about MTN, I too am struggling to cancel a contract that ended a year ago just because MTN is trying to take money I do not owe them. I feel bad for their employees, because I'm sure they deal with complaints constantly. Anyway, stay safe.