Capitec banking app

So I downloaded the new latest version of the new app I promted me to insert my account number and password witch I did and after 5 minutes of activating it tells me to try again went to the branch at Quagga center the sales person sent a verification code to my cellphone and did not receive any sms from them she told me to try another sim card witch I did the next day that sales person also told me the same noe how can I have a sim card that does not work as ek sms from elsewhere then the person told me that they can do nothing for me what kind of s#!$ service from Capitec bank