Santam does not want to pay my money which was incorrectly debited

I asked Santam to move my insurance start date from March 1st to April 1st. They did not because they are profit driven. I made a follow-up after they debited me, and agent told me the money will be reversed and it will reflect in my account within 4 days. To date I'm not yet paid and I suffered a financial inconvenience due to the poor business practice. I want my money to pay for my child fees.