Contract cancellation

I had a contract insurance for my device with MTN, underwritten by Santam and it was cancelled on the 11th of December when my device contract came to an end. I then moved to prepaid insurance for my device and I was invoiced as per below:

December 2025 - Invoiced for contract and prepaid insurance January 2026 - Invoiced for contract and prepaid insurance. I was informed that from February onwards, I will only be invoiced for contract insurance as I was serving the 30-day notice with the contract insurance in January. February 2026 - I am being invoiced for contract and prepaid insurance. When I called MTN they advised that my contract insurance is still active on their side, when I called Santam, they advised that the contract insurance is no longer active, the prepaid insurance is the only one active. I am being reaped off and the back and forth is not helping to resolve the issue. I don't understand why I am paying for 2 different insurances when one was cancelled on the 11th of December 2025 and I received confirmation telephonically and in writing.