Useless service

Years ago I opened my Nedbank account and I used my current adress were I live and no problems. Then I moved to Cape Town and changed adress no problem. Now I have moved back to Kimberley to my old adress were I ise to live. I went into the bank to change my adress back so they can sent my documents to the right adress. Took my proof of adress id with and asked them to please change it for me as I have important papers that MFC needs to send to me. Lady logged into my profile to change details and said she can't help me, as the system doesn't pickup my adress, I told her it is not possible as I have opened my account on that address and have the proof of address and all my other post of different accounts comes to that address they didn't had any problems changing it for me. So she told me it is because the suburb is in Afrikaans the system can only take English names. So I told her Kestellhof have been a suburb in Kimberley for many years and that is what it is there is no other name of spelling for it, even on my id it is the same, so she just shook her shoulders threw up her hands and said she can't do anything I must go and she will see if she can later do something. Still waiting nothing happened. I need to get my paper work before month end. Phoned customer service they can't help either. So what must I do now as nobody helps me, maybe I will get bettwr service at a nother bank if I move my account, a bank that have a working system.