Debited my account/terrible customer service

They debited R800 from my account (not even on my debit date) after me paying them R1000 two days ago. I called the call center and was on hold for 20 minutes. The agent says the debit does not show on their side so I have to wait 7 days for the system to update thereafter I have to wait another 7 to 10 days for them to do the refund. The agent did not even want to transfer me to her manager. They took seconds to take the money out of my account but I must now wait almost a month to get a refund. Their customer service is terrible and extremally unhelpful.