Standard Bank app has no scan button

I have tried to pay a new beneficiary on my Internet Banking site but when I try to pay, I get a message to log in to m banking app and scan the QR code. When I start the log in the Scan button in the lower left corner shows but disappears once the login is completed. I have tried the call centre but was no 145 in the queue, left my number for a callback hours ago, but no callback. So how do I fix this, brilliant IT people at Sub-Standard Bank?