Re-Instate Account

I opened my Markham account on the 03/12/2011. I sent numerous emails to the customer care department to assist me by setting up a debit order on my account. After several emails, (non of them got a reply) , I stopped getting account statements in the post. I presumed that the matters has been dealt and payment will be deducted as per my numerous request. I received my credit records today, and to my surprise I was listed as a bad payer with a huge amount outstanding. I called the customer care and spoke to Isaak who informed me that the account is not handed over for collection, but the amount of R2848.30 is outstanding and I can pay it the nearest outlet. He confirmed that my account will not be active any more and the account will be unusable. I do not want this account to be closed ! I will not be making the payment until this matter has been resolved and I can use the card whenever I feel like. I have copies of all the emails, with the delivery report for all of them. Please assist me with what to do so that I can uphold my clean credit record and continue using my card when it is needed.