Edgars accounting department is quite pathetic!

I have had my Edgars account since 1987 and I never missed a payment. On Saturday 10 October I received an SMS saying that I am R173 behind with my account, although I know that I had paid up my account. Checked my e-mails and the last account that I received showed that I owned R0. I still went and paid this "outstanding" amount. On the 13th October I phoned the number given on the SMS and I went through to Edgars' collections department. I told the lady that I never received a statement with that amount, she said that she would send my October statement. I told her to please close my account as I do not want to deal with Edgars any longer if this is how they now operate. She sent an e-mail to close my account and cc'd me on it. On the 14th October I received a letter dated the 8th of October that my account is arrears. On the 15th October I only received my October statement showing the outstanding amount. I attached these e-mails and once again asked for my account to be closed. Today the 20th October I still have not received any kind of feedback from your accounts department. I phoned *** to find out if anything has been put on my account to close it and was told there was nothing and that she would request to to have it closed. What else must I do to close my account as I do not want to deal with a company that hands you over for collections without even contacting you to tell you that there is a problem with your account.