Telkom couldn't get a simple debit order correct

7 months ago I asked that my debit order details be changed. The branch keeps confirming that the account has been updated and debits will go off the account since March, they have still not gotten it right and keep reffering the matter to their Nu Debt management that keeps contacting me. I've been into the store numerous times and have had to do cash payments to correct the bill. I have emailed their manager at the Gateway store and got no repsonce even going in didn't help as she refused to even come out of her office to find out what was the issue. This is pathetic client services and follow up processes. The buck keeps getting passed around and in interim my credit rating is taking a huge knock.