Failing to do the job

On the 06 July 2015 i have called call center and informed the consultant that i want to change my bank details, he advised me to send a signed letter plus the new banking details which i want to change to, which i did on the said day still. today im calling back to find out why my account is not debited. i was assisted by Whitney Marope who advised that they have not received my new bank details and that my account remain unpaid for this month and that it will again take 5-6 working days for the account to be changed. i cannot accept that because now my account will remain unpaid and i will fall into arrears with late payment etc as if i did not do my part. someone did not do their job and cannot afford to fall into arrears due to negligence and failure to do the job. i want my bank ac count changed immediately and the debit order to run so that my account can be up to date. i refuse to do cash payment as i have done my part well on time and standard bank employees or their system is sabotaging me. should i not get a response i will report this to the national credit regulator as this behavior is unacceptable.<br> .