ABSA is failing to provide proof of Pro-rata payment

I have a car and household insurance with Absa when I bought my car in 2017. It was around the 19th of October and since my debit Order was supposed to run from the 15th of each month, they deducted a pro-rata payment which from my understanding was supposed to cover me until the next debit Order day which is the 15th of November. Fast forward, I have canceled my policy with Absa Idirect insurance effect 15 September 2022 and I was informed that they are going to deduct a pro-rata payment which is from 1 to 15 September 2022. Since when is the payment for insurance coverage paid in arrears? I have requested for proof of deductions and I was informed that they don't have 2017 records. All I want is proof that the first payment covered me until 31st October 2017 and not 14th November 2017.

I'm happy with the service they have offered me for the past 5 years and I would want our relationship to remain good. Thank you, I will wait for the response with supporting documentation.