Nedbank Money App a nuisance!!!!

The Nedbank Money App is nothing but a whole lot of inconvenience, I have tried to use it a couple of times, and every time it always says my username and password do not match. I have called Nedbank Call centre several times, where the agent walked me through setting up a new password. A few days later, I got the same error message. I then uninstalled the app and re-installed it on the 02/05/2018, and went through the whole process of setting up the Username and password. On the 04/05/2018 I used the app for some few transactions, and later on when i tried using it again, I get an error message saying "something's wrong - A server error has occured, please retry again later".

Why should I try later when I want to do my banking now? The whole reason was for convenience. I'm sorry but Nedbank has kissed my business goodbye. I cannot be held ransom with my own money.