Terrible service resolving authentication

Every single time I call FNB or Ebucks. I have trouble being authenticated by the system When I put in the last 6 digits I get a notice that it doesnt match my profile..... but its correct, sometime after 2-3 tries it goes through. Every call centre agent promises to fix this issue and never does. Latest was the ebucks call centre that refused, they advised they can only log a call to fix this issue once I'm authenticated, which is silly because thats exactly what needs to be fixed.

please resolved ASAP