MTN NOT CANCELLING SIM ONLY DATA CONTRACT

Since April 2023 I have been requesting MTN to cancel my data sim only contract and they are not cancelling it. In April I paid the early cancellation fees and the balance that I was owing at the time, and they have not cancelled my contract. I have been calling and sent from one department to the other, one department would say its not a Consumer contract number it must be cancelled by Business contracts department, when they transfer me to Business contracts department then I am told it's a Consumer contract number which must be cancelled by Consumer department. I am not getting any help from MTN customer care, I have also sent emails to Retentions department and Retentions Manager and I am not getting help, no one is interested in cancelling this contract number. Thabisa Dlepu from MTN also knows about my case, she also sent emails to Retentions Manager and Sandra Mabunda but no one is helping cancel this contract. Every month I am still billed for the number or service which I am no longer using which is not fair. This contract should have been cancelled in April already when I paid early termination fees and the balance outstanding at the time. I need help.