Nedbank freezing my account without notification

My business bank account was frozen on 28 feb with nedbank not notifying me. This resulted in me not being able to make payments on the 1st of month to my client which was very embarrasing. My banker then told me on Monday that is because of Fica documentation outstanding? We opened the account in 2016 and fica is required every 5 years which is only 2021. Anyway i sent the documents through and thought everything was ok? Then on the 10th of March one of my clients say they did not get their payment which was set as a recurring payment. I tried making a payment and they froze my account again. My banker then told me nedbank loaded another shareholder on the system that does not correspond to our shareholder documents and that we should fill in another form to correct this mistake. Why must We fill this in if they made the mistake in the mean time I cannot make payment and the worst is that they dont even let me know about freezing the account. This was very embarassing for me that i could not make payments.