Total lack of service from FNB

Good day ,there is a debit order trying to go off my credit account that's been failing although there's more than enough funds in the account to cover it. I mailed the complaints department in a attempt to resolve this matter but was contacted by a consultant who tried to brush me off saying that its a supplier issue,I explained that all the supplier needs to do is provide my requested services and debit my account as agreed ,my responsibility is to make sure that the funds are available and my banks responsibility is to make sure the funds are released ,which is where the problem comes in as \the bank\" is rejecting the payment. I've since e-mailed the complaints dept again and this time simply got no response. As a result of this ,my perfect credit record is now being tarnished as FNB themselves have now listed me as a high risk client ,fnb has charged me failed debit order fees over 18 times in the past month alone and the supplier has suspended my service!!! Please fix this issue ,refund the failed debit order charges and fix the issues I now have with the credit berua as a result of this , If this isnt fixed asap I will be contacting the NCR ,my contact number is ***"