MTN & ADMYNTEC deducting insurance premiums despite cancellation.

*** . I cancelled my MTN subscription after the contract expired and migrated from post paid to pre paid. I received confirmation of this from MTN on 10 February 2025. On the 4th of April 2025 an amount of R126.58 was debited from my bank account. I followed up on this and was advised that it was for insurance. I requested a cancellation of the insurance, and received confirmation that the insurance was cancelled on the 14th of April 2025 (reference number ***). I received this confirmation from a lady via email who represents ADMYNTEC - who handle the insurance on behalf of MTN. During June 2025 another amount of R126.58 was debited from my bank account for MTN insurance. I once again have contacted the service provider at *** . I received the reference number ***. I have been told that this has been escalated to the relevant department. Since then I have followed up several times but to no avail. In the meantime I reversed the debit order, but am concerned that this "missed payment" will have a negative impact on my credit rating. This situation is completely unfair and cannot be allowed to continue. Please assist to rectify the situation.