Make sure that Santam acts on requests

I bought a car from my cousin. The car was insured on her dad's Santam policy. Her dad then asked his broker to remove the car from his Santam policy. The day I collected the car I added the car to my Santam policy that will be 1 November 2019. My uncle being old and not always looking at his debit orders only realized in May 2020 that he was still paying for the car on his insurance. Santam then came back and asked for a letter from me that I bought the car. I included my policy schedule showing that the car was on my Santam insurance. Santam now does not want to accept the letter that they asked for. How can they now not want to refund the premiums for the car to my uncle as they have now collected double premiums for this car for the last 8 months.

Can Santam please explain this to me.