Business account app issues

I have a business account but for some reason on the app it keeps saying my pin is incorrect. I have called and went to the branch but all I have received is poor service I have been promised numerous of callbacks but no one calls. They sent me a form but when I call to ask what needs to be done they can't assist. I went to the branch and all they say is they don't deal with business accounts this is pathetic. I am changing banks. Capitec is pathetic