Hello Discovery insure has been intermittently debiting R1800 from my account insted of the R1400 that they forcefully decided to implement post the claim that left me without a car for 4 months

Hello Discovery insure has been intermittently debiting R1800 from my account insted of the R1400 that they forcefully decided to implement post the claim that left me without a car for 4 months. I have been ask to submit proof of this debit orders like the know nothing about this.