Poor Service and Refusal to Cancel the Contract after multiple requests

I have multiple contracts with MTN and one of them was ending in August 2025. I have sent a cancellation request but they still billed me out of contract. I have sent emails to their various departments including their *** email and no response. I got an email that they are suspending the line for the out of contract billing they billed in August which was unwarranted as I had cancelled my contract with them in July and nothing was done. This is incompetence at its best.

MTN Billing Account BA***