Double deduction

I'm very disappointed with Capitec. I changed my Funeral plan debit order in July to being the last day of the Month, and I received confirmation of an updated document. In July it debited on its normal date which i understand. August it debited on the last day and then it debited the 1st September which is now a double deduction. i called the call center and spoke to a consultant who said on her side it shows that the debit date is the 1st which i could not understand as i asked for last day and on the document it confirms last day of the Month. Consultant could not understand why it shows the 1st and requested that we change the date from the 1st which i told her my documents are not incorrect its their system that has an issue. i'm still waiting for the email that was suppose to be sent to Insure regarding my case. May you please refund me my premium that was collected twice as your system issues has nothing to do with me.