Your debt collectors are annoying

I must be missing something here as I am beyond this now. Your debt collectors call me all the time regarding my revolving loan. They tell me the acc is in arrears which I cannot understand as I squared up the account and even did so when they interest was charged. I borrowed R5000 end of July and they called me to say that the acc was in arrears as no payment had been made since June. I would like to understand what I'm missing here... The account was in a positive balance when I borrowed the money I have never defaulted on any payment to you but yet I have debt collections calling me asking for money. How can I owe money since June when the account was in a positive balance and I borrowed end of July which I'm assuming the debit order would go off August sometime? Done it before what is different now? I have now squared up the account and it is now once again in a positive balance. Pls can Standard bank call me so I can resolve this issue. I'm sick and tired of these imbeciles calling me day in and day out over what??????? I want to close this now and be done with it. Everytime the interest would be taken I would square it up not to be in arrears. Have a look at my statement and see I have paid all the time. I have not missed a payment. Pls tell your debt collections to STOP CALLING ME and get facts straight first. I want this resolved by next week I am done with this now. THE ACCOUNT IS IN A POSITIVE BALANCE NOW PLS GO AND CHECK THAT I WANT TO CLOSE IT NOW... BEYOND ANNOYING THIS. I have been a client orb yours for years and never EVER HAD A PROBLEM. This is just getting ridiculous now. Pls call me to sort this out.