Account number problems

A few months ago I had to close my Nedbank account due to ***** and I opened a new KeYona account. Since then when I need to be paid by people, or even add my new account details at SARS I have a problem with the account number. An error keeps coming up that the account number doesn't exist. I have doubled checked many times on my actual account and its not incorrect. Why can't I get paid or use my new account number?? Its highly inconvenient to have constant problems with Nedbank and get nowhere with the call centre