Ned banks faulty systems and communication breakdown

Complaint *** and SHETIFF PROCEEDINGS : CCHA149468. These guys at Ned bank have had a complete communication break down. I app**** for a card in December. I filled in an application with my current details and all was good. In January My Old details from a bond account that I had with Ned bank years ago defaulted my details from then into my profile. I call many times to have my details updated and changed to no avail. Eventually I contact the retail recovery centre and explained the situation. Still to date they have not rectified this even tho the account is up-to-date they have closed it because of no communication which is entirely their fault. I was contacted by a manager in June and was assured that they would rectify this communication break down. I was told not to do anything until he had returned my call. Kamel *** is his profile number and does not answer the phone. Who do I turn to to get this sorted out. Absolutely pathetic service.