Unable to register online to access my MFC account

I have been struggling to register for a Nedbank ID for a while now. When I call I am told that my details have been captured incorrectly and after being promised the one time that it has been rectified was told that I should try in 24 hours and that I would be able to register. A few days later I was still not able to register due to a technical error - when I called I was put through 4 different people and the 4th person (Philip) eventually told me that they cannot help me as I have to go into the bank to fix the problem. I don't know why I have to go into the bank for a simple telephone number to be changed as it was not mine fault that someone captured my information wrong in the first place.