Being debited for a Settled account

I went to a African Branch in Bloemfontein and was told that the only people who can assist me was the call centre, we then called the call centre Leroy Louw took my call, I explained that I settled my credit card on the 19/06/2015 but then a debit order of R500.00 went off on the 25/06/2015 and was promised that the account will be closed and I will get my refund, they didn't close my account and refunded me only R341.22, when they debited R500.00 he kept me on for 6 minutes then hung up on me. I called the call centre again and Salome Baloyi answered and I asked her who did I talk to before her she asked me to hold, then disappeared then hung up, my third call I spoke to Nomthandazo Masinga, she told me that Leroy put through a refund request for the debit order that was taken on the 24/07/2015 she and her manager cant access the refund, therefore cant tell me how much is the refund or even stop the refund. So my account is still open and rude consultants are not doing their jobs, they keep on apologising for each other but I'm still stuck with debit orders going through my account. They must sort themselves out and close the card.