Having a problem with the banking app

I've been having a problem for almost 2 months I even gave up and decided to delete the app I'm trying to activate the banking app from providing my savings account and remote pin and taking selfie it's all working good but the problem starts when I have to do verification I was told to not close the app I followed the instructions then I received the sms but after it says verification failed but I don't understand why?? Because I receive the sms but it says verification failed i need help, some can access their banking apps without visiting any nearest branch but i have to why??