Cancellations and worst customer services

I have a cancellation query that has been pending since March. Noloyisa Biyela from MTN cancelled my contract without my permission and later promised me I will not be debited in April because it has been cancelled. April I am being debited and she changes her story that she didn’t know. You cannot give clients wrong information, cancel their contracts without my consent and not even fix my query. I asked for the call recording but no one is willing to assist. Khanyisa her manager promised to resolved this query it’s been a month nothing from her. Complaints department called to apologise and they will investigate. Khanyisa made it clear that she doesn’t care about what her agent did and will promote MTN to give us horrible services at all times. I gave a simply instructions on when the last day of my contract ends they should not renew it and Noloyisa decides to cancel in March and come back to still make the matter worse to promise me I will not be debited . I will plan that April they will not debit and make plans for that money to help me then later to see MTN debiting my account. MTN retention has the worst services ever and no one want to take accountability