Why does the OBSSA exist? They work for the banks not the public!!

Nedbank wanted R21000 repayment on debt of R9000, then their debt collection lawyers are charging excessive fees. I have been asking for a resonable repayment amount but want a written repayment agreement so I know what I am paying for. They tell me that fees (admin and ..and..and) plus intestest with be ongoing but cant give me an amount or settlement agreement. Adriaan du Plooy an Adjudicator for OBSSA has requested emails, has requested communication and an investigation was done. To be told their is nothing they can do. They cannot force the bank to accept lower repayments - after I got an email saying they accept an amount and have informed the OBSSA they accept to be told by Norlam (their debt lawyers) that they will only accept it for 3 months. They have done absolutely nothing, the frustrating thing is from the onset of communication I expressed I want a settlement agreement amount indicating how long I will be paying and basically after a 2 month investigation they send an email saying that they cant do anything, then after the agreed amount from bank was not accepted by Norlam, again they ask me for the emails (with proof the bank accepted it) they say they cant do anything. So why the heck did they ask for the emails, why did they take 2 months to investigate when they cant do anything????? Why do they exist? What is their use? I would like to know if they have ever been able to assist anyone in the history of their existence? I got the distinct impression they work for the banks and not for consumers/victims!