Annoyed, And thinking of migrating back to FNB

I have never been so embarrassed with your banking app, You know I have never experienced such with FNB, I thought me moving to SBSA will make my banking experience better, so I was at garage trying to pour petrol for some odd when I tried transferring funds from Pure save acc to my actual transaction acc, and it kept on kicking me out of the app, Now its even worse when I tried to log back in, it now sent me an OTP to my email acc, that time I do not have data to check emails, I am so Flippen annoyed ,cuz It came across as if I am at a garage with no money, that time I am also running late for work, How did the OTP get enabled in the first place because I use biometric to login to the app, I am so agitated by this Bank and it's banking, I have never had such an encounter with FNB, why enable this feature to begin with without my consent