Incorrect Billing

I went to Hertz OR Tambo Intenational on the 24-02-2018 to rent a car,I then returned it on the 26-02-2018,to my surprise the rental money was debited from my account then again on the 02-03-2018 another money was debited from my account again.I called the customer services on the 04- ********** and a certain guy told me to call on the 05-03-2018,I did that on the 05-03-2018 and was told that there was a failt on their side and will refund the full amount that was taken on the 24-02-2018 and I did not receive any money into my account at the momemnt. I need the money to be paid back ASAP.