device cancellation fee

I am extremely dissatisfied with the service I have received from the MTN Contract Department. I cancelled my contract on 18 December 2025 and was informed that my final payment would be on 20 January 2026 for an amount of R815. I called today to confirm that the January payment was indeed the last one, only to be told that another payment of R698.14 will still be deducted on 20 February 2026 for a “cancellation device charge.” At no point was I informed about any additional device cancellation fee that would be payable in February. Your agents clearly stated that 20 January 2026 would be the final payment. This level of service is unacceptable, especially considering my loyalty to MTN over the years. I request a full and clear explanation for this unexpected additional charge.