REFUND REFUSED.

I was unable to pay my full instalment of R2699.00 for July.I made a part payment of R700 for July and then called the call centre and spoke to Vincent Motshabi(***5) ,I was still owing R2000.00 for July's Instalment for which i made an arrangement to pay R500 x 4 Months starting from the ***2 all was well.On the 24/07/2015 my debit order goes off for R2699.I called in the call centre spoke to Nondumiso Xulu told here that I am requesting a refund because I paid R700 and made arrangements to pay the balance of R2000 over 4 months and my debit order still went off.She just blatantly refused saying that there was no arrangement for July.I tried to explain that there would not be an arrangment for July because I already paid what I could and then arranged to pay the balance over 4 months starting from the following month.She blamed Vincent for not advising me properly and said that she can only refund me R700 that is in advance but I need to send proof of payment that I am the person that actually paid that R700.If I could afford to pay my full instalment I wouldnt have made a part payment and arrangement.I would have just paid the account.