No answer from contact centre

I have been struggling to get hold of your contact centre the entire day! The numbers on the banking app I am calling keeps saying welcome to Discovery bank and I hold on endlessly. My fnb app is locked out when I didn't even enter the incorrect password. I changed the password and it keeps saying my app is blocked because of 3 failed attempts! Please can someone urgently get back to me on this because this level of service is unacceptable for such a well-known and large organization. I'm disappointed man