FNB Dissatisfied with app

Fnb Olympus branch pretoria - this is the worst experience i had with FNB since i have been banking with them. No one is capable in verifying my device to my app, my previous phone was ******... and the only way they can do it is with the old phone.... then they told me to do it online - i have done this.. online i dont have the verify button. I have called and still they told me to fo to a branch. At the branch no one can help... bianca have been pleasant in trying to help me. Someone needs to fix this problem with the app and verification. I am appalled