ACCOUNT SETTLED BUT STLL DEBITED

I have settled my nedbank mastercard on the 11th of July 24. I forwarded my proof of payment to debtbusters to close the account since it's settled, there was no response only after 2 days I received an email stating that the payment has been received and they notified their accounts department hence I didn't receive any form of communication from account department. Since then there was no communication and I was reluctant that if there is no communication they will debit my account of which they did on the 25th of July 24 the amount is R1 843. How can they debit whereas I settled the account. I received an email stating that the amount will be refunded in 3 working days till today there was no refund. I have sent an email to follow up to Siphosethu since he/she sent me an email stating that refund, no response. This is a ****, of which I'm not impressed with. Even with debtbusters if you don't follow up on your statements you with them you will pay for rest of your life.

With my refund I trust it will reflect by next week Monday by close of business. 3 days it's overdue