Billing Issues

I have emailed you on a number of occasions to find out what the matter is with my account and why I am in arrears since you have the correct account details on your system. The last time I called, I was told that the issue was with the branch code and the matter should be sorted after that. I then got an email saying I need to pay a certain amount which I found strange since I have a debit order set up with you. The last correspondence from you was on Feb 10, 2015 where I was told that the matter has been escalated to Nomsa in your legal department in finance as my account has been handed over. I emailed back on March 5, 2015 to find out when Nomsa will be calling so we can sort this out. Till today, I have not received any call from Nomsa. I now (July 23, 2015) get an SMS about a final payment reminder. What does it take to fix this matter with you guys? A debit order is there for a reason.