Need my paid up letter

Hi. I am currently under debt review and I have paid up all my debts. I only need the paid up letters from Standard bank now to complete the process. I called the call center and I had to answer the security question. The debt was from awhile ago and they wanted to know the address from when I signed up for the account. I gave them7 all the addresses I have lived in since then but they said none were correct. Fair enough so I went in to the Standard bank branch to get some assistance. The lady put in all my details and said I would get an SMS and an email. I waited a week and no SMS or Email. I call the call center and again they wouldnt assist me because I couldn't give them the answer to the security question. I went into the branch again and was assisted by a gentleman who called the call center while I was there. The call centers system was down so they asked him to email them andd he CC'd me in and they said they would get back to me. I waited a week and no email. I emailed them myself and again no email back. I called and again they wont assist me because I couldn't answer their security question. I explained I have been into the branch twice but their system was offline and I have the email. But still they refused to assist me. All I want is my paid up letters!. Who do I go to here for some help?