Billed for an inactive contract

Hello. This is the third time I have this issue with MTN as I am expected to pay R1189 for a contract that they failed to close/cancel. I had an contract with MTN that I app**** for in 2019 and they alerted me that it would be cancelled by 08/03/2021. Yet the store failed to cancel it and I kept getting billed for it even after numerous attempts to cancel it,even this very morning I called and they told me their system was down and they could not help me so they would transfer me to another to another “service champion” but in so doing she dropped the phone I remember her name was Lerato. I think MTN is maki g this process incredibly difficult as a way to keep us in debt because their service champions are unable to brighten my day in any way. As I stated above this is now the first time I have needed their help,you can’t even get your account canceled in store they tell you that you need to call,tv when didn’t even alert me that this place only operates at certain times during the week. I am very disappointed in MTNs incompetence.